About Size Convertly
What We Do
Size Convertly is a free set of tools for converting clothing, shoes, rings, bras, accessories, sports gear, and bedding sizes between the US, UK, EU, and other regional standards. We built it to solve a simple, recurring problem: shopping internationally often means guessing at a size that doesn't match what you're used to.
Our Approach
Every conversion chart on this site is built from standard, widely-published international sizing references. All calculations happen instantly in your browser — there's no account to create, no app to download, and no data sent to a server.
Accuracy Disclaimer
Sizing standards vary between brands, manufacturers, and even individual garments, so treat every chart here as a reliable starting point rather than a guarantee — when possible, check a specific brand's own size guide for the most precise fit.