Size Converters
International sizing, translated — rings, shoes and bras across US, UK, EU and more, plus measure-at-home guides. Body measurements are personal data: here they never leave your browser.
- Ring Size Converter Ring systems measure the same thing differently: a US 7 is a UK N and an EU/ISO 54.4
- Shoe Size Converter A US men’s 9 is a UK 8, an EU 42.5 and a 26.5 cm foot
- Bra Size Converter A US 34DD is a UK 34DD but an EU 75E and a FR 90E
- Clothing Size Converter (Women) A US 8 dress is a UK 12, an EU 38, a FR 40, an IT 44 and a JP 13
- Kids' Shoe Size Converter Kids' US sizes run 0C–13.5C then restart at 1Y–7Y
- Hat Size Converter A 57 cm head wears a US 7⅛ fitted hat (UK 7)
Frequently asked questions
Why do clothing and jewelry sizes differ between countries?
Each region built its scale on different historical units — EU shoe sizes count Paris points, UK sizes count barleycorns, ring sizes range from US numbers to UK letters to ISO millimeters. The converters map between them using the standard published charts.
Are my measurements uploaded anywhere?
No. Body measurements are exactly the kind of personal data that shouldn’t touch a server — these tools run entirely in your browser, transmit nothing, and work offline.
How accurate are converted sizes?
Ring conversions are exact (all systems measure the same circumference). Shoe and bra conversions follow the standard charts, but manufacturers vary — the measurement-based inputs (foot length in cm, finger circumference in mm) are the most reliable route.