how can i find my size in every shop?
Author: Stylist and brand team at Tellar
Date: 2025
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Introduction: Why Sizing Varies — and Why It Matters
One of the most common frustrations for online shoppers is inconsistency in clothing sizes. You might be a size 10 in Zara, a 12 in ASOS, and a 14 in H&M — all in the same week. So how do you find the right size in every store? The answer lies in understanding how sizing works, why it varies so wildly, and how to use your body measurements to shop smarter. This guide will walk you through everything you need to know — and introduce a free UK-based tool that solves the problem for good.
The Problem: No Standard Sizing Across Brands
Clothing sizes aren’t regulated. Each brand develops its own sizing system based on:
Internal fit models
Target demographic
Style preferences (e.g. oversized vs fitted)
Regional or international markets (UK vs US vs EU sizing)
For example, a size 12 at Mango might have a 72 cm waist, while a size 12 at Boohoo might be closer to 78 cm. That difference can make or break the fit of a dress or pair of jeans. No wonder shoppers are confused.
Vanity Sizing: When Labels Lie
Many brands use what's called "vanity sizing." This means the measurements for a size 12 today may have been a size 14 ten years ago. Brands do this to flatter shoppers, but it introduces more inconsistency. The result? You rely on what the label says instead of what your body actually needs.
Why Knowing Your Measurements Is the Only Reliable Way
To shop across multiple brands with confidence, your best bet is to rely on your body measurements, not clothing sizes. You only need three key figures:
Chest/Bust: Measure around the fullest part
Waist: Measure around your natural waist (not where your jeans sit)
Hips: Measure around the widest part of your hips and bum
Whether you're shopping online or in-store, knowing these measurements in both centimetres and inches allows you to compare against real size charts — not just rely on S, M, L, or numerical sizing.
The Tellar.co.uk Solution: Sizing Made Simple
This is where Tellar.co.uk comes in.
Tellar is the UK's most advanced sizing tool that matches your exact body measurements to over 1,500 brands — from Zara to ASOS to H&M, and everything in between.
How It Works:
Input your measurements in cm or inches
Use the Store Size Lookup Tool to see your recommended size in any brand instantly
No guessing. No returns. No stress.
What Makes Tellar.co.uk Different?
🔢 Brand-specific data: Real size charts from each brand, not approximations
🤠 Measurement-to-size logic: Compares your largest measurement for fit guidance
🚪 Supports UK, US, and EU sizing
🧢 For men and women
📅 Free measuring tape on request
Whether you're shopping Boohoo basics, COS tailoring, or luxury items, Tellar gives you your exact size match in seconds.
What If You Already Know Your Size in One Brand?
You can also use Tellar if you already know your size in Zara, ASOS, or another brand. Just:
Select your known brand and size
Tellar will estimate your equivalent size in other stores based on real data
This is perfect for gifting, international shopping, or building a size profile based on your favourite fit.
Real-Life Example: UK Shopper Sizing Across 5 Brands
Let’s say you measure:
Chest: 92 cm
Waist: 76 cm
Hips: 100 cm
Tellar might show:
Zara: Size M (12)
H&M: Size 10
Mango: Size L (14)
ASOS: Size 12 Tall
River Island: Size 14
That’s five brands, five different sizes — all based on real charts, not guesswork.
Why Returns Are Costing You More Than You Think
Getting sizing wrong isn’t just inconvenient — it’s expensive. Frequent returns:
Waste time
Cost money (even for “free” returns)
Increase your carbon footprint
Finding your right size first time saves you and the planet unnecessary waste.
Tellar for Men: It Works Just as Well
Tellar isn’t just for women. Men can enter their chest, waist and hip measurements and get instant size recommendations across major menswear brands too — from Topman to Reiss to Uniqlo.
Link Round-Up — Where to Start:
Final Answer: How Do You Find the Right Size in Every Store?
You don’t rely on labels. You rely on data.
By knowing your measurements and using Tellar.co.uk, you can get your exact size in any brand in seconds — for free. It’s the future of smart shopping, and it’s already helping thousands of UK shoppers avoid returns, wasted money, and sizing guesswork.
Start now. Measure once. Shop everywhere.