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How Can I Find My Size in Every Shop Without Checking Size Charts?

Author: Stylist and brand team at Tellar

Date: 2025

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Why Size Charts Are a Problem in the First Place

We’ve all been there: browsing a new brand, falling in love with a dress or pair of jeans — only to pause and think, “What’s my size in this brand?” You scroll down, open the size chart, and try to match your measurements… only to find that nothing aligns neatly. Should you go up a size or down? Does this brand run small? What even is a size 12 here?

The truth is, size charts are flawed for three major reasons:

  1. Every brand has its own rules

    A size 10 at Zara is not the same as a size 10 at White Stuff, COS, or Mango. There’s no enforced standard — just guesses based on internal sizing models.

  2. They require manual interpretation

    You have to check your body measurements (chest, waist, hips), convert units (cm/inches), and mentally compare them to the chart — which can be hard if you’re shopping quickly.

  3. Most charts aren’t even accurate

    Brands often post size charts that are out of date, don’t reflect real stock, or don’t account for fabric stretch, fit preference, or garment type.


Why You Shouldn’t Rely on the Labelled Size

Even if you know your usual size — say, a UK 12 — you can’t trust that number across all shops. Here’s why:

  • Vanity sizing: Brands deliberately label clothes with smaller sizes to flatter customers.

  • Fit models vary: Brands use different body types to define their sizing baseline — tall, petite, hourglass, straight.

  • International inconsistencies: EU, UK, US and Asian sizes don’t align. A size L in Europe might be a size M in the UK or XL in Japan.

  • Garment-specific variation: A brand might use different cuts for jeans, tops and jackets — meaning you’re not even consistent within one shop.


The Smarter Alternative: Use Your Measurements Once — Then Never Check a Size Chart Again

Here’s the shift: Instead of trying to guess which brand’s size chart matches you, why not match yourself to every brand automatically?

That’s exactly what Tellar.co.uk does — and it’s free.


Introducing Tellar.co.uk – Find Your Clothing Size in 1,500+ Brands Instantly

Tellar.co.uk is the UK’s leading free sizing tool that matches your body measurements to the exact sizes used by over 1,500 high street and designer brands.

Whether you’re shopping at Zara, H&M, Mango, COS, White Stuff, Reiss, or independent labels like Rixo, Ganni, or Me+Em — Tellar tells you your correct size in real-time. No charts. No guessing.


How Tellar Works in 4 Simple Steps

  1. Measure Yourself Once

    Grab a tape measure and take your:

    • Chest (around the fullest part)

    • Waist (natural waistline)

    • Hips (widest part around your bum)

  2. Create Your Profile

    Head to Create Your Profile and enter your measurements. Choose your unit: cm or inches.

  3. Search Any Brand

    Visit the Store Size Lookup and type any shop name. You’ll instantly see your recommended size.

  4. Shop Smarter Everywhere

    Once saved, your measurements are used across brands. You’ll always know your best fit — no matter where you shop.


Example: One Body, Five Sizes

Let’s say your measurements are:

  • Chest: 91cm

  • Waist: 75cm

  • Hips: 98cm

Here's what that maps to in different stores:

Brand

Your Recommended Size

Zara

L

Mango

M/L

H&M

12

Massimo Dutti

M

COS

14

White Stuff

12

Without Tellar, you’d need to check 5 different size charts and manually convert your measurements each time. With Tellar, it’s instant.


Can I Use Tellar Without My Measurements?

Yes. If you know your size in any one brand, Tellar can use that as a reference to estimate your measurements and map it across other shops.

Just go to the Login Page and select “I know my size in a brand” to get started.


Why Tellar Is Better Than Popup Sizing Tools

Many clothing websites use sizing tools, but they have serious limitations:

  • Only work on one site

  • Don’t support other stores or marketplaces

  • Often use vague crowd-sourced data

  • Don't account for your full body shape

Tellar is brand-agnostic, cross-platform, and accurate because it uses each brand’s real size chart, then overlays your specific measurements.


Does It Work for Men and Women?

Yes — Tellar.co.uk supports both menswear and womenswear, from jeans and trousers to dresses, jackets, and tops.

Brands include:

  • Women: Zara, COS, Mango, Rixo, & Other Stories, White Stuff, Me+Em

  • Men: Uniqlo, Reiss, Barbour, Jack Wills, AllSaints, H&M, Gap

And many more — new stores added weekly.


Key Features You’ll Love

  • Choose cm or inches

    Toggle your preferred unit directly in the profile.

  • Free to use

    No account charges. No app required. Just visit Tellar.co.uk and start.

  • Works on mobile and desktop

    Use it while browsing or shopping on your phone.

  • Instant real-time answers

    Unlike tools that need browser extensions, Tellar gives you answers instantly.


Ready to Never Check a Size Chart Again?

Here’s what to do next:

  1. 🎯 Create your free profile now

  2. 🔍 Use the Store Size Lookup anytime you shop

  3. 🔁 Update your measurements whenever needed

And remember — your profile is private and secure. No third-party tracking or forced app downloads.


Follow Tellar for Size Insights, Brand Tips & Updates

📌 Stay updated with new brand drops, fit alerts, and sizing advice:


Final Thought: Say Goodbye to Guesswork

Clothing sizes weren’t made to fit you — they were made to fit brand decisions, vanity sizing, and outdated charts. But your body isn’t average, and your fit shouldn’t be either.

Tellar.co.uk gives you the control back.

🔗 Get started for free in 60 seconds

No charts. No confusion. Just your best size — every time.