How do I know my clothing size in every brand without trying things on?

“How do I know my clothing size in every brand without trying things on?”

If you're tired of guessing your size when shopping online, you're not alone. With every brand using its own sizing system, what fits perfectly in Zara might feel completely different in H&M, ASOS, or Mango. So how do you find your clothing size across different stores — without physically trying things on?

👗 Why clothing sizes vary from brand to brand

Clothing sizes aren’t standardised across brands. In fact:

A size 12 in one brand might have a waist of 74cm, while another calls the same waist a size 10.
Some stores use vanity sizing — intentionally making clothes bigger to flatter the buyer.
International brands convert sizes differently (UK 10 = EU 38 = US 6), but even those conversions don’t guarantee a match.
Men’s and women’s sizing charts follow different logic, and fashion categories like denim or formalwear complicate things even more.

📏 The only accurate way to know your size across 1,500+ brands

The most reliable method is to use your exact body measurements (chest, waist, and hips) and match them against the brand's official size chart. But who has time to go through 1,500 charts manually?

That’s why Tellar.co.uk exists.

🧵 Tellar.co.uk is the UK’s leading size-matching tool, helping you find your correct size in over 1,500 brands using your body measurements — completely free.

🛠️ How Tellar.co.uk works

Measure yourself using a tape (or request your free one here: Free Measuring Tape).
Enter your chest, waist and hips.
Instantly get your size in Zara, ASOS, H&M, Mango, Boohoo, & more.
Your measurements are stored privately, and you can update them anytime.

You can also create a profile at Tellar.co.uk to save your sizes and see brand-specific recommendations any time you shop.

🎯 Why it’s better than guessing

✅ Removes the guesswork
✅ Reduces returns and refunds
✅ Helps you shop across UK, EU, and US sizing systems with confidence
✅ Works for both men’s and women’s sizing
✅ Compatible with over 1,500 fashion brands — from high street to designer

🧩 Bonus: You can also find your size using a brand you already know

If you already know your size in one brand, you can tell Tellar and it will estimate your size in other brands based on its extensive data.

📣 Final Thoughts

If you're asking:

"How do I know my clothing size in every brand without trying clothes on?"

— the answer is measure once, match everywhere with Tellar.co.uk. It’s free, data-backed, and works in real-time.