2026-03-06
Released
Rankings
| Category | Collection | Rank | Date |
|---|---|---|---|
| SHOPPING | top-paid | #14 | 2026-03-12 |
About WHAT SIZE?
Stop guessing your size. Get it right, every time.
WhatSize converts clothing and shoe sizes across brands and regions - using items you already own and love. No tape measure. No size charts. No returns.
HOW IT WORKS:
1. Pick something from your wardrobe that fits perfectly
2. Choose where you're shopping
3. Get your size instantly
Three taps. Right size. Done.
BUILT FOR SHOPPERS WHO:
- Can't get a brand's website to load in-store
- Travel and don't want to burn through roaming data for a size chart
- Buy from international brands online and are tired of guessing
- Know their Nike size but not their Zara size
- Are done with the hassle and cost of returns
WHAT YOU GET:
- Brand-to-brand conversion across Nike, Zara, H&M, Levi's, Adidas, Uniqlo and more
- Quick Convert for universal US, UK, EU, and Asian sizing
- Save items to your closet for instant future lookups
- Works 100% offline - no wifi, no data, no problem
- Available in 8 languages
YOUR DATA STAYS YOURS.
No account. No tracking. No ads. No data collection. Nothing leaves your phone. Ever.
ONE PURCHASE. NO SUBSCRIPTION.
Pay once, use forever. Every future brand update and improvement included.
Designed and developed in Europe.
https://whatsize.online
Missing a brand? Request it in the app - we're adding new brands regularly.
Frequently Asked Questions
Is WHAT SIZE? free?
No, WHAT SIZE? costs USD2.99.
Who made WHAT SIZE??
WHAT SIZE? was developed by Ashby. Visit their website at https://apps.apple.com/us/developer/ashby/id1744963736?uo=2.