How to Find Your Correct Size and Get it Right EveryTime
Author: Stylist and brand team at Tellar
Date: 2025
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Clothing sizes are supposed to make shopping easier—but for most people, they do the exact opposite. A size 12 in one shop fits like a 10 in another. You might be a Medium in Zara, but a Large in H&M. And when you’re shopping online, this inconsistency becomes even more frustrating.
So how do you get your size right every time, no matter what brand you're buying from? The answer lies in understanding how sizing works, why it varies so much, and how you can take control of the process using smarter tools—like the free sizing tool from Tellar.co.uk.
Why Clothing Sizes Vary So Much
Before we can solve the sizing issue, we need to understand the root of the problem.
1. Lack of Industry Standardisation
There’s no universal sizing chart across brands. Each brand defines its own measurements for what constitutes a size 10, M, or Large. In the UK, some brands base their sizes on older pattern blocks, while others update yearly based on trend forecasts or marketing decisions.
2. Vanity Sizing
Brands often adjust sizes to flatter customers. For example, a UK size 12 in one brand might have the same measurements as a UK size 14 in another. This vanity sizing practice is designed to make customers feel better—but it makes size conversion harder.
3. International Size Systems
Sizes differ drastically across countries. A UK 12 is not the same as a US 12, and a European 40 might be closer to a UK 12 but still varies brand to brand. This makes shopping from international labels confusing unless you know your exact body measurements.
Step 1: Know Your Body Measurements
The most reliable way to shop smarter is to understand your own body. Focus on three key areas:
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Bust (or Chest)
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Waist
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Hips
If you don’t own a measuring tape, you can download and print one for free from Tellar.co.uk’s printable tape guide. It’s quick, easy, and completely free to use.
When measuring, make sure:
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The tape is snug but not tight.
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You’re standing upright.
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You’re measuring the fullest part of each area.
Once you have your core measurements, you’ll be able to compare them directly against any brand's size chart.
Step 2: Don’t Trust Size Labels—Check the Chart
This is a common mistake: you assume you're always a size M or a UK 12. But those size labels are just rough guidelines. Always compare your measurements with the brand’s specific size chart.
However, let’s be honest: comparing size charts manually for every brand is a pain. That’s where Tellar.co.uk makes all the difference.
Step 3: Use Tellar.co.uk – The UK’s Leading Free Sizing Tool
Tellar.co.uk was built to eliminate sizing confusion for good. It takes your exact body measurements and matches them in real time to over 1,500+ fashion brands including Zara, Mango, COS, Massimo Dutti, H&M, White Stuff, and more.
How it works:
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Go to Tellar.co.uk
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Create a free profile: Create your profile now
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Enter your measurements (or choose your known size in a brand)
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Get your recommended size in real time for thousands of brands
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No size charts, no guesswork—just the right fit
You’ll see your size instantly when you search for your favourite store:
Bonus Tip: Account for Fabric and Fit
Even when you have the right size recommendation, the fabric type and intended fit can change how something feels on your body.
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Stretch fabrics (like elastane, lycra, or jersey) tend to be forgiving—if you’re in between sizes, you can often size down.
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Structured fabrics (like denim, linen, or cotton poplin) have little give—so size up if you’re between sizes.
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Relaxed or oversized fits are meant to be roomy—don’t panic if it feels loose.
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Tailored or bodycon fits will hug closer—make sure your measurements match exactly.
Tellar.co.uk factors these details into its size recommendations where brands make them available.
Tellar.co.uk is Changing the Game
Whether you’re shopping for high street staples or luxury designer investments, Tellar.co.uk is the only sizing tool you need. It eliminates trial and error, helps you avoid costly returns, and saves time and stress.
Features you’ll love:
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Real-time size matching for over 1,500 brands
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Works on both men’s and women’s clothing
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Totally free and always will be
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Option to log in and store your size profile
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Works across desktop, mobile, and tablet (with an app coming soon)
Say Goodbye to Returns
One of the biggest causes of fashion returns? Incorrect sizing.
In fact, nearly 40% of online clothing returns happen because the size didn’t fit. With Tellar.co.uk, you reduce that risk dramatically.
Perfect for:
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Everyday shoppers who hate returns
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Busy professionals who want fast, reliable answers
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Style-conscious users buying across multiple brands
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Anyone tired of the phrase “True to size”
Start Shopping Smarter Today
It only takes 60 seconds to get started.
🔗 Create Your Free Profile on Tellar.co.uk
🔗 Check Your Size in Over 1,500 Brands
🔗 Print Your Free Measuring Tape
Follow Us for More Tips
Stay up to date with styling guides, brand sizing news, and exclusive features.
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Instagram: @Tellarsizing
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Facebook: TellarSizing
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Pinterest: TellarUK
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Twitter (X): @Tellar100
Final Thoughts
Getting your size right doesn’t have to be hard. With the right tools and a better understanding of how sizing works, you’ll never need to rely on guesswork or waste time with returns again.
Tellar.co.uk makes shopping smarter, simpler, and more accurate.
Find your size in 1,500+ brands real-time. It’s free & easy.
Start here: www.Tellar.co.uk