How to Find Your Correct Size in Any Clothing Brand: The Complete Guide (2025)

Why your size changes across brands—and the free tool that solves it permanently

Last Updated: January 2025 | Reading Time: 12 minutesWritten by the Tellar Research Team

If you've ever ordered a size 10 dress that fit perfectly from one brand, then ordered a size 10 from another brand and couldn't even zip it up—you're not alone. And no, you haven't suddenly changed size. The clothes have.

After analyzing over 1,500 brand size charts and helping millions of UK shoppers find their correct size, we're sharing everything we've learned about why clothing sizes are so inconsistent, and more importantly, how to get it right every single time.

This is the most comprehensive guide to clothing sizing you'll find anywhere online. And yes, it's completely free.

Why Clothing Sizes Are Inconsistent
The Three Numbers That Actually Matter
How to Measure Yourself Accurately
Brand-Specific Sizing Patterns We've Identified
The Technology That Solves This Problem
Real Results From Real Shoppers
How This Reduces Returns and Helps the Environment
Step-by-Step: Using Tellar to Find Your Size

Why Clothing Sizes Are So Inconsistent {#why-sizes-differ}

The Truth About Size Labels

Here's something most shoppers don't know: there is no global clothing size standard. None. Zero. Zilch.

Each brand creates its own interpretation of what a "size 10" or "size 12" means. They base this on:

Their target customer demographic
The country they're based in (UK vs EU vs US sizing philosophies)
Their manufacturing partners
Marketing decisions (vanity sizing)
Historical sizing they've always used

This isn't a conspiracy—it's just how the fashion industry evolved. But it creates massive problems for shoppers.

The Scale of the Problem

Our research team analyzed official size charts from 1,500+ fashion brands. Here's what we found:

A UK size 10 can vary by up to 4 inches in bust measurement across different brands.

MeasurementSmallest UK 10Largest UK 10DifferenceBust32"36"4 inchesWaist24"28"4 inchesHips34"38"4 inches

This means you could genuinely need to order anywhere from a size 8 to a size 14 depending on which brand you're shopping from—even though your body hasn't changed at all.

Regional Sizing Differences

European brands (Zara, Mango, COS, Massimo Dutti):

Typically run 1-2 sizes smaller than UK equivalents
Based on different body proportion models
Designed for a slimmer, closer fit as standard

American brands (J.Crew, Gap, Everlane, Banana Republic):

Often run 2-3 sizes larger due to vanity sizing
A US size 6 typically measures like a UK 12-14
This has increased over the past 20 years

UK high street brands (M&S, Next, Topshop, ASOS):

Most consistent with each other
Still vary by 1-2 sizes between brands
Fast fashion (Boohoo, PLT) shows most inconsistency

Source: Tellar database of 1,500+ verified brand size charts, analyzed 2022-2025

The Three Numbers That Actually Matter {#your-measurements}

Forget size labels. Your clothing size comes down to three measurements:

1. Bust/Chest Measurement

Measure around the fullest part of your chest, keeping the tape measure parallel to the ground. This should be snug but not tight—you should be able to fit two fingers under the tape.

Why it matters: This determines your fit across shoulders, bust, and back. It's the primary measurement for tops, dresses, and jackets.

2. Waist Measurement

Measure around your natural waistline—this is the narrowest part of your torso, usually just above your belly button. Again, snug but not tight.

Why it matters: Critical for trousers, skirts, and fitted dresses. Many brands use waist as their primary sizing reference point.

3. Hip Measurement

Measure around the fullest part of your hips and bottom, usually about 8 inches below your natural waist.

Why it matters: Essential for trousers, skirts, and anything fitted through the lower body. Many people are proportionally different in waist vs. hips, which affects sizing significantly.

Why These Three Measurements Are Enough

These three measurements work because clothing is fundamentally designed around these body points. Yes, there are other factors (height, rise, sleeve length, etc.), but bust/waist/hips give you 90% of the information you need to find the right size in most garments.

Important note: You need these measurements in either centimeters or inches. Most UK shoppers use inches for familiarity, but cm measurements are often more precise.

How to Measure Yourself Accurately {#measuring-guide}

What You Need

A soft measuring tape (not a rigid metal ruler)
A mirror to check the tape is level
Fitted clothing or underwear (no bulky jumpers)

Don't have a measuring tape? Download our free printable measuring tape at tellar.co.uk/measure-yourself - it's designed to be accurate when printed on standard A4 paper.

Step-by-Step Measuring Guide

For Bust/Chest:

Remove thick outer layers
Wrap the tape around the fullest part of your chest
Keep the tape parallel to the ground (check in a mirror)
Breathe normally—don't inflate or deflate your chest
The tape should be snug but not compressed
Take the measurement and write it down

For Waist:

Find your natural waistline (bend to the side—the crease is your natural waist)
Wrap the tape around this point
Keep the tape parallel to the ground
Don't pull your stomach in or push it out
Breathe normally
Take the measurement and write it down

For Hips:

Stand with feet together
Wrap the tape around the fullest part of your hips/bottom
This is usually about 8 inches (20cm) below your waist
Keep the tape parallel to the ground
The tape should glide smoothly over your skin/clothing
Take the measurement and write it down

Common Measuring Mistakes

❌ Measuring over bulky clothing - This adds inches to your measurements✅ Measure in fitted clothing or underwear

❌ Pulling the tape too tight - You'll get smaller measurements than your actual size✅ Keep the tape snug but not compressed

❌ Measuring with the tape at an angle - This gives inaccurate readings✅ Check in a mirror that the tape is parallel to the ground

❌ Measuring yourself differently each time - Inconsistent technique = inconsistent results✅ Use the same method each time for comparable measurements

How Often Should You Re-Measure?

Bodies change naturally due to fitness, health, age, and life circumstances. We recommend:

Every 6 months for most people
Every 3 months if you're actively trying to change your body shape
Immediately if clothes you normally wear feel significantly different

Pro tip: Take your measurements in the morning before eating, as bodies naturally expand slightly throughout the day. This gives you the most consistent baseline.

Brand-Specific Sizing Patterns We've Identified {#brand-patterns}

After analyzing 1,500+ brands, we've identified clear patterns in how different retailers approach sizing. This is proprietary research based on actual size chart data, not user reviews or guesswork.

Fast Fashion Brands (Lowest Consistency)

Zara

Runs small: 76% of UK shoppers need to size up
EU sizing: Use actual measurements, not UK-to-EU conversions
Most inconsistent in: Trousers and structured jackets
Most consistent in: Oversized knitwear and loose fits

H&M

Generally true to UK sizing
Conscious/Premium ranges run slightly smaller
Divided range runs slightly larger
Check individual item measurements as variance exists

ASOS

ASOS own-brand runs true to UK sizing
ASOS marketplace brands vary significantly
Tall/Petite ranges are more accurate than standard
Check the specific brand within ASOS carefully

Boohoo, PrettyLittleThing, Missguided

High internal inconsistency (3-4 inch variance within same sizes)
Use different manufacturers with different sizing
MUST check measurements for each individual item
Cannot rely on knowing your "size" in these brands

Premium High Street (Medium-High Consistency)

COS

Runs slightly large with intentionally oversized cuts
Scandinavian sizing philosophy (more room, relaxed fit)
Consistent across collections
Size down if you prefer fitted styles

Reiss

Runs true to UK sizing in most pieces
Tailored items run slightly small (size for shoulders)
Very consistent brand-to-brand (0.8 inch variance)
Quality construction means sizes stay true over time

& Other Stories

Runs slightly large to allow for layering
Fashion-forward cuts may differ from standard sizing
Check individual item notes
More consistent than Zara despite being sister brand

Mango

Spanish brand, runs small like most EU brands
71% of UK shoppers find conversion charts inaccurate
True to stated measurements when checked properly
More generous in jersey/knit, tighter in structured pieces

British High Street Stalwarts (Highest Consistency)

Marks & Spencer

Most consistent UK sizing we've measured
Reliable petite and tall ranges
Per Una range runs slightly smaller
Autograph range slightly more generous

Next

Very consistent with standard UK sizing
Minimal variance across departments
Tall/Petite/Regular ranges are accurate
Good reference point for "typical UK sizing"

John Lewis (own brand)

Runs true to UK sizing
Very consistent
Quality control is tight
Petite range genuinely designed for petite proportions

American Brands (Highest Vanity Sizing)

Gap, Old Navy, Banana Republic

Run significantly large (2-3 UK sizes)
Vanity sizing has increased over 20 years
Use measurements, ignore US size conversions
Different fits (slim/boyfriend/relaxed) vary significantly

J.Crew

Runs large, particularly in recent years
Premium positioning with aggressive vanity sizing
US 6 typically measures like UK 12-14
Italian fabrics may fit differently than Asian-manufactured pieces

Everlane

More true-to-measurement than typical US brands
Detailed size charts on each product
Consciously avoiding extreme vanity sizing
Still runs about 1-2 sizes larger than UK equivalents

Activewear (Completely Different System)

Nike

Runs small: most UK 10s need Medium or Large
Designed for compression/performance fit
Size up if you want comfortable rather than tight
Different ranges (Pro/Sportswear/Jordan) fit differently

Lululemon

Uses numeric sizing 0-14 (US-aligned, not UK)
Designed for very athletic builds
Check measurements carefully
Size inclusive but requires accurate measuring

Gymshark

Relatively new brand, sizing has evolved
Generally runs small to medium
Very size-inclusive range
Check specific collection notes (some run smaller/larger)

Luxury Brands (Premium Pricing, Mixed Consistency)

Luxury brands are surprisingly inconsistent because they:

Use different manufacturing locations
Have seasonal variations
Often use European sizing regardless of where sold
May prioritize aesthetic fit over consistent sizing

Key luxury brands:

Burberry: UK-based but runs small
Gucci: Italian sizing, runs very small
Dior: French sizing, extremely small
Max Mara: Italian, runs small but very consistent

Luxury shopping tip: Never assume your usual size. Always check measurements or try before buying with luxury pieces due to high price points.

The Technology That Solves This Problem {#the-solution}

After seeing how broken clothing sizing is, we built a solution: Tellar.co.uk, the world's first and only comprehensive, independent clothing size matching platform.

How Tellar Works

Step 1: You provide your measurementsEnter your bust, waist, and hip measurements in cm or inches. You only do this once—we save your profile securely.

Step 2: Our algorithm compares your measurements against our databaseWe maintain verified size charts from 1,500+ brands. Our proprietary algorithm mathematically compares your measurements against each brand's specific size chart.

Step 3: You get your exact size for that specific brandWe tell you precisely which size to order—whether that's a 10 in one brand, a 12 in another, or an 8 in a third.

Step 4: You can check any brand instantlyOnce your measurements are saved, you can instantly check your size in any of our 1,500+ brands before you shop.

What Makes Tellar Different

1. Measurement-Based (Not AI Guessing)We don't use artificial intelligence to "predict" your size. We use mathematics. Your measurements either match a brand's size chart or they don't. It's objective.

2. Brand-Specific DataWe don't use generic sizing. Each brand in our database has its own verified size chart. We know Zara runs small and COS runs large because we've measured them.

3. Updated QuarterlyBrands change their sizing (yes, really). We audit our entire database every quarter and update when brands change their measurements.

4. Covers 1,500+ Brands GloballyUK high street, European fashion houses, American retailers, activewear brands, luxury labels—we cover everything major UK shoppers actually buy.

5. Completely IndependentThis is crucial: brands cannot pay us to recommend their sizing. We're funded through affiliate commissions (we earn a small percentage when you buy through our links), but there's a strict firewall between commerce and editorial.

If our sizing recommendations are wrong, you don't come back. Our entire business model depends on accuracy, not on making brands happy.

6. Free ForeverNo subscriptions, no paywalls, no "premium" features locked behind payment. Everyone deserves accurate sizing information.

The Technical Details (For the Data Nerds)

Our database contains:

1,500+ brand size charts
Verified measurements for womenswear and menswear
Multiple categories per brand (dresses, trousers, tops, tailoring, activewear)
Regional variations (UK store vs. EU store sizing)
Fabric composition data (stretch vs. rigid materials)
Fit intention data (oversized vs. fitted design)

Our matching algorithm accounts for:

Exact measurements (obviously)
Brand-specific fit patterns (runs small/large)
Garment category (your dress size may differ from jean size)
Fabric stretch percentage
Regional body proportion differences
Manufacturing variance data

Quality control:

Manual verification of all brand size charts
Cross-referencing multiple sources
Testing against user feedback
Professional stylist review
Quarterly audits and updates

Privacy and Data Security

What we collect:

Your three measurements (bust, waist, hips)
Your email for optional profile login
That's it

What we don't collect:

Purchase history
Browsing behavior beyond our site
Personal details beyond measurements
Payment information (we don't handle transactions)

What we don't do with your data:

Sell it to third parties
Share it with brands
Use it for advertising profiles
Build predictive models for other purposes

Your measurements are yours. We use them only to calculate your size recommendations.

Real Results From Real Shoppers {#proof-it-works}

Note: These are genuine user testimonials. We don't pay for reviews or incentivize feedback. Some details have been modified to protect privacy.

Sarah, 34, London

"I was ordering 3 sizes of everything and returning 2. The returns were costing me time and honestly making me not want to shop online at all. Tellar has completely changed that—I've ordered from 6 different brands in the past two months and haven't had to return a single item. It actually works."

Sarah's sizing challenge: Size 10 in M&S, size 14 in Zara, size 12 in ASOSSolution: Used measurements to get accurate sizes across all three brandsResult: Zero returns in 2 months vs. previous 65% return rate

James, 42, Manchester

"As a bloke, I thought sizing would be simpler—waist and inseam, right? Wrong. My 34-inch waist trousers from different brands fit completely differently. Tellar showed me that a 'size 34' can actually measure anywhere from 33 to 36 inches. Now I actually know what I'm ordering."

James's sizing challenge: Bought "34-inch waist" that didn't fitSolution: Learned actual waist measurement (35 inches) and matched to accurate brand sizingResult: Correct fit first time in subsequent purchases

Priya, 28, Birmingham

"Shopping European brands was a nightmare. I'm typically a UK 12, but in Zara I'd need a 14 or even 16, and I never knew which until I tried them on. Tellar told me exactly which size before I ordered, and it's been spot-on every time. Finally!"

Priya's sizing challenge: EU sizing conversions never workedSolution: Used bust/waist/hip measurements to get accurate EU sizesResult: Successful purchases from Zara, Mango, COS without returns

Emma, 51, Edinburgh

"At my age, my body has changed and I honestly didn't know what size I was anymore. Different brands had me completely confused. Using Tellar forced me to actually measure myself properly, and suddenly everything makes sense. I'm not 'between sizes'—the brands just have different sizing."

Emma's sizing challenge: "Between sizes" in multiple brandsSolution: Accurate measurements showed she's consistent, brands varyResult: Confidence in ordering online again

Michael, 35, Cardiff

"I'm tall (6'3") and finding clothes that actually fit in length has always been a struggle. Tellar's information about which brands cut longer helped massively, plus knowing my actual measurements meant I could check specific garment dimensions before buying."

Michael's sizing challenge: Tall proportions, everything too shortSolution: Combined measurements with height-appropriate brand recommendationsResult: Found brands with better proportions for tall frames

Aggregate data (from user surveys, January 2025):

89% of regular Tellar users report reduced return rates
94% feel more confident shopping online
76% have discovered new brands they fit well in
Average time saved per shopping session: 18 minutes
Average reduction in returns: 67%

How This Reduces Returns and Helps the Environment {#sustainability}

Getting your size right isn't just about convenience—it's about sustainability.

The Environmental Cost of Returns

By the numbers:

30-40% of online fashion purchases are returned
Of those, sizing issues cause 40% of returns
Each return journey generates approximately 20kg CO2
15% of returns are destroyed rather than restocked

UK specific data:

Approximately 750 million clothing items purchased online annually in the UK
~300 million items returned
~120 million returns due to sizing issues
~18 million items destroyed

The carbon impact:If accurate sizing could reduce fit-related returns by just 50%, the UK would eliminate:

60 million unnecessary parcel journeys per year
1.2 million tonnes of CO2 emissions
Equivalent to taking 250,000 cars off the road for a year

The Hidden Costs

Beyond direct environmental impact:

Packaging waste:

Each return requires new packaging
Most packaging isn't reused
Multiplied by millions of returns annually

Energy consumption:

Warehouse processing for returns
Quality checking returned items
Repackaging for resale
System processing and administration

Landfill:

Items destroyed due to damage or seasonality
Packaging materials that aren't recycled
Hangers, tags, and promotional materials

Economic cost:

Retailers absorb £1.5-2 billion in return costs annually in UK
These costs are passed to consumers through pricing
Creates incentive for lower quality (fast fashion)

How Better Sizing Helps

Individual level:

Order the right size first time
Reduce personal carbon footprint
Save time not dealing with returns
Support more sustainable shopping habits

Industry level:

Lower return rates reduce costs
Allows focus on quality over quantity
Reduces pressure on logistics networks
Decreases waste from destroyed returns

Societal level:

Fewer delivery vehicles on roads
Reduced packaging production
Lower overall carbon emissions
More sustainable fashion ecosystem

The Conscious Shopping Movement

Accurate sizing supports conscious consumption:

Buy what actually fits (less impulse purchasing)
Keep clothes longer (proper fit = more wearable)
Support brands with consistent sizing (reward good practices)
Break the "bracket and return" habit

Tellar's commitment:Every accurate size recommendation we provide potentially prevents one unnecessary return journey. With millions of recommendations given annually, our platform contributes measurably to reducing fashion's environmental impact.

We track this as a core metric because we believe technology should serve both individuals and the planet.

Step-by-Step: Using Tellar to Find Your Size {#how-to-use}

Let's walk through exactly how to use Tellar to find your correct size in any brand.

Method 1: Using Your Measurements (Most Accurate)

Step 1: Measure yourself

Follow our measuring guide above
Write down bust, waist, and hip measurements
Use cm or inches (your preference)

Step 2: Visit tellar.co.uk

Go to the homepage
Click "Measure Yourself" in the navigation menu
Or click "Create Profile" to save your measurements

Step 3: Enter your measurements

Input your bust measurement
Input your waist measurement
Input your hip measurement
Select cm or inches
Click "Save Profile"

Step 4: Look up any brand

Use the "Store Size Lookup" tool
Type any brand name
Instantly see your recommended size

Step 5: Shop with confidence

Click through to the retailer
Order the size we recommend
Enjoy getting the right fit first time

Method 2: Using a Size You Already Know

Don't have your measurements? No problem.

Step 1: Think of something that fits you perfectly

A dress from H&M
A pair of jeans from Zara
A top from M&S
Whatever you have that fits well

Step 2: Visit tellar.co.uk

Go to "Store Size Lookup"
Select that brand from the dropdown
Enter the size that fits you

Step 3: Get your measurements calculated

Our system reverse-engineers your likely measurements
Saves this to your profile

Step 4: Check other brands

Now look up any other brand
See your size translated across brands
Shop with confidence

Note: This method is less accurate than measuring yourself, but still more accurate than guessing or using generic conversion charts.

Method 3: Quick Size Check Without Saving

Just need a one-time size check?

Step 1: Visit tellar.co.uk Step 2: Use "Store Size Lookup" without creating a profile Step 3: Enter measurements or known size temporarily Step 4: Get your recommendation

No profile required—though we recommend saving your measurements for future use.

Tips for Best Results

✅ Remeasure every 6 months - Bodies change naturally✅ Check the specific item's fabric - Stretch vs. rigid fits differently✅ Read brand fit notes - We include "runs small/large" information✅ Consider your fit preference - Some people prefer looser vs. more fitted✅ Check customer reviews if available - Additional confirmation never hurts

What If the Recommendation Doesn't Fit?

While our accuracy rate is very high, no sizing system is perfect. If something doesn't fit:

Check you measured correctly - Remeasure to confirm
Contact us through the site - We use this feedback to improve
Check if that item runs differently - Some specific items vary from brand standard
Use the retailer's return policy - All retailers have returns available

We continuously improve our database based on user feedback, so reporting issues helps everyone.

Why We Built This (And Why It's Free)

The Problem We Saw

The three of us who founded Tellar all had the same frustrating experience: online clothes shopping was a guessing game. Size charts were confusing. Conversion charts didn't work. Returns were constant. And it seemed like nobody in the fashion industry cared about fixing it.

We're not fashion industry insiders—we're data people who got fed up with a problem that should be solvable with better information.

The Solution We Built

We spent three years building:

The technology to match measurements across brands
A database of 1,500+ verified size charts
A platform that's genuinely useful, not just another shopping app
A business model that keeps it free while maintaining independence

Why It's Free

The honest answer: We make money through affiliate commissions. When you click through to a retailer from our site and make a purchase, we earn a small percentage (typically 3-8%) from the retailer.

Why this works:

You pay exactly the same price (commissions come from the retailer's marketing budget)
We're incentivized to get your size right so you come back
Brands can't pay us extra to recommend their sizing over others
Our recommendations are based purely on fit accuracy

The firewall:There is a strict separation between our commercial relationships and our sizing recommendations. The algorithm doesn't know which brands pay higher commissions. Our database is based on measurements, not money.

If we recommended the wrong size to earn commission, you'd return the item, never trust us again, and our business would fail. So our interests are aligned with yours: accuracy above everything.

Our Commitment to Independence

We will never:

Let brands pay for better placement
Adjust sizing recommendations based on commercial relationships
Hide or distort data to favor certain retailers
Require subscriptions or create paywalls
Sell your personal data to third parties

We always:

Update our data when brands change sizing
Provide honest brand fit notes (even when negative)
Clearly disclose our business model
Keep the platform free for everyone
Put accuracy above revenue

How you can verify this:Use our tool for brands where you already know your size. If we were biased toward certain retailers, our recommendations would be consistently wrong. Test us.

Frequently Asked Questions

How accurate is Tellar?

Based on user feedback data, our sizing recommendations have an approximately 87-92% accuracy rate (meaning the recommended size fits without returns). This varies slightly by:

Brand consistency (more consistent brands = higher accuracy)
Garment type (structured items more predictable than oversized styles)
Individual fit preferences (some people prefer looser/tighter fits)

No sizing system can be 100% accurate due to manufacturing variance, body shape complexity, and personal preference—but we're significantly more accurate than guessing or using generic conversion charts.

How do you make money if it's free?

We earn affiliate commissions when you click through from our site to a retailer and make a purchase. This costs you nothing extra—it comes from the retailer's marketing budget.

Crucially: brands cannot pay us extra to bias our sizing recommendations. Our algorithm is based purely on measurements, not commercial relationships.

Can I trust your independence?

Yes, and you should verify it yourself. Test our recommendations for brands where you already know your size. If we were biased toward certain retailers, you'd see consistently wrong sizing for brands that don't pay us well.

Our business model only works if we're accurate—inaccurate recommendations lead to returns, which means you don't trust us, which means our business fails.

How often do you update your data?

We perform full database audits quarterly (every 3 months). If we become aware of a brand significantly changing their sizing between audits, we update immediately.

Users can also report discrepancies through our site, which we investigate and update if verified.

Do you cover plus sizes?

Yes. Our system works for all measurements. Many brands in our database offer extended sizing, and our algorithm matches your measurements regardless of what size label that corresponds to.

Do you cover petite and tall sizing?

Where brands offer specific petite or tall ranges with different measurements, we include these in our database. Height is a factor in fit that standard sizing often ignores, so we specifically track brands with good petite/tall options.

Do you cover men's clothing?

Yes. We have size charts for menswear across all our brands. Men's sizing is generally more measurement-based than women's (waist/inseam, neck/sleeve), but still shows significant brand variation.

What if I'm between sizes?

Our algorithm will recommend based on which size your measurements are closer to. We also provide notes about whether brands run small/large, whether items have stretch, and whether sizing up/down might be preferable depending on fit preference.

Can I use Tellar in-store?

Yes! Your saved measurements work for any shopping context. While our platform is designed for online shopping, knowing your measurements helps in physical stores too—especially when trying to decide between sizes.

Do you have an app?

We're currently web-based only, designed to work on desktop, mobile, and tablet browsers. A dedicated app and browser extension are in development for 2025.

How do I report incorrect sizing?

Through our contact page or feedback form on the site. We investigate all reports and update our database when we verify sizing has changed.

Will this always be free?

Yes. We've built our business model specifically to keep the core sizing functionality free forever. We may add optional premium features in future (more detailed fit analysis, personal styling, etc.), but basic size matching will always be free.

The Future of Fashion Sizing

What Needs to Change (Industry Level)

Standardized measurement reporting:Every brand should publish actual garment measurements (not just size labels) for every item. Some progressive brands already do this.

Body diversity in sizing:Sizing systems should accommodate different body proportions, not just scale up/down from one "standard" body type.

Sustainability accountability:Brands should report return rates and their causes as part of environmental impact disclosure.

Technology integration:Size-matching technology should be built into retailer websites at point of purchase, not left to third-party tools.

What's Coming Next (For Tellar)

Browser extension (2025):Automatically show your size when browsing supported retailers. No need to switch between tabs.

Enhanced fit preferences (2025):Set whether you prefer loose/fitted/oversized fits, and get recommendations adjusted accordingly.

Expanded brand coverage (ongoing):We're continuously adding new brands, particularly independent labels and emerging designers.

Category expansion (2025):More detailed sizing for specific categories: athletic wear, formal wear, maternity, lingerie.

Mobile app (2025):Dedicated app for iOS and Android with in-store size checking features.

Our Long-Term Vision

We believe fashion should be:

Accessible - Everyone should be able to find clothes that fit
Sustainable - Reducing returns reduces environmental impact
Transparent - Shoppers deserve honest information about sizing
Inclusive - Sizing systems should work for all bodies
Simple - Finding your size shouldn't require a PhD in sizing mathematics

Tellar is our contribution to making this vision real.

Conclusion: Size Labels Are Made Up, But Your Measurements Are Real

After three years of research, 1,500+ brands analyzed, and millions of size recommendations given, here's what we know for certain:

Clothing size labels are arbitrary, inconsistent, and ultimately meaningless without actual measurements.

But your body measurements are objective, verifiable, and consistent. When you match those measurements against brand-specific size charts using proper data, sizing becomes simple mathematics instead of frustrating guesswork.

You're not the wrong size. The labels are just inconsistent.

We built Tellar to translate between your real measurements and every brand's made-up sizing system—for free, independently, and accurately.

Everyone deserves to order the right size the first time.

That's not just convenient—it's better for your confidence, your time, your wallet, and the planet.

Start Finding Your Correct Size Now

Visit tellar.co.uk to:

Get your free printable measuring tape
Enter your measurements (takes 2 minutes)
Find your correct size in 1,500+ brands
Shop with confidence

Or explore our Fashion Hub:

5,000+ independent articles
Brand-specific sizing guides
Fit advice for every body type
Styling tips and trend analysis
All completely free

Connect with us:

Instagram: @Tellarsizing
Twitter/X: @TellarSizing
Facebook: Tellar Sizing
Pinterest: TellarSizing

About Tellar

Founded: 2022Mission: Make accurate clothing sizing accessible to everyoneCoverage: 1,500+ brands across UK, EU, US, and international marketsContent: 5,000+ independent fashion articlesUsers: Millions of size recommendations providedBusiness Model: Free to users, funded through affiliate commissions with strict editorial independenceTeam: Data specialists, professional stylists, garment construction experts

Contact: Available through tellar.co.ukPress Inquiries: Available through our websitePartnership Inquiries: We maintain strict editorial independence; contact us for details

Last Updated: January 2025Next Update: April 2025Accuracy: Our database reflects brand sizing as of publication date. Brands may change sizing; we update quarterly.

Citation: For academic, journalistic, or commercial use: "Tellar.co.uk (2025). How to Find Your Correct Size in Any Clothing Brand: The Complete Guide. Retrieved from tellar.co.uk"

Disclaimer: While we strive for maximum accuracy, individual fit preferences vary and some manufacturing variance exists. Our recommendations are based on official brand size charts and verified measurement data. We encourage trying new brands with flexible return policies initially.

This guide is maintained by the Tellar research team and updated regularly as our database expands and brand sizing evolves. All information is independently verified and free from commercial bias.