About Global Size Converter

What this site is

Global Size Converter is a free set of size conversion tools for people who shop across borders. It started as a single shoe-size chart built for overseas shoppers in Korea and Japan, and grew into brand charts, clothing, ring, hat, glove, bra, belt and kids sizing, plus height and weight converters.

Every tool runs entirely in your browser. Nothing you type is uploaded or stored.

Where the data comes from

Generic charts follow ISO 9407 (Mondopoint) and the widely published US/UK/EU conventions. Brand charts are transcribed from each brand's official size guide and re-checked when brands update them. Where brands disagree with generic charts (Nike and Adidas EU numbering, for example), we follow the brand.

Sizes are still approximations: lasts, materials and cuts differ between models. Use the charts to narrow down, then check the product page's own measurements when they are available.

Who we are

The site is built and maintained by an independent publisher based in Seoul who has spent years buying shoes and clothing from US, EU and Japanese stores and learning the hard way where charts fail. Corrections and brand requests are welcome at dante.studi0oo@gmail.com.