My Size
My Size
Stop guessing your size when shopping online. Instantly convert shoes, tops, pants, and hats across US, EU, UK, Korea, Japan and more.
See It In Action
Size Converter
How to Measure
My Size Profile
Features
Type in one size and get all country standards at once. US, EU, UK, Korea, Japan — results appear as you type, no button to press.
Covers all major clothing categories. Separate charts for men's and women's tops, with KR letter sizes included alongside numeric standards.
Store your foot length, chest, waist, and head circumference once. The profile tab shows your full size chart across every standard instantly.
Not sure how to measure? Step-by-step illustrated instructions for each body part — find your exact measurement before you convert.
Nike, Adidas, Uniqlo, Zara, Levi's, and 13 more. Each brand has its own sizing quirks — we tell you whether they run large, small, or true to size.
All size data is built into the app. No internet required — works in the dressing room, on the plane, or wherever you shop.
What You Can Convert
Enter foot length in mm → KR / US Men & Women / EU / UK / JP
Chest circumference or KR numeric → S–XL / EU / US / UK / JP
Waist in inches or cm → US-KR inch / EU / actual cm
Head circumference in cm → KR / S–XL / US / UK
How It Works
Choose from shoes, men's or women's tops, pants, or hats. Select your gender where applicable.
Type in your foot length, chest, waist, or any known size. Adjust with the +/- buttons for precision.
Results appear instantly. No submit button — see US, EU, UK, KR, JP sizes all at once.
Free to download. No account needed.