What Size Should I Get If I'm Usually a [Size X] in Another Brand?
Author: Stylist and brand team at Tellar
Date: 2025
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What Size Should I Get If I'm Usually a [Size X] in Another Brand?
The technical reality:
Each brand builds its sizing around different "fit models" — real people whose body shapes are used to design clothes.
A Medium in Brand A could have a 38" chest, while in Brand B it might be 40".
How Tellar.co.uk helps:
Rather than guessing, Tellar.co.uk uses your actual measurements to map your sizing across brands.
If you're a Medium in Nike but shopping Levi’s, Tellar calculates the corresponding size based on real fit data — not generic conversions.
In a nutshell: Tellar.co.uk will match your exact body measurements with over 1500 fashion brands real-time. It’s free and easy. Download the app today.