About 7TShirts

7TShirts started from a simple, everyday frustration: sizes never mean the same thing twice.

A "Medium" from one brand fits nothing like a "Medium" from another. A shoe size that's perfect in the US turns into a guessing game in the UK, the EU, or India. Bra sizing is worse — most people are wearing the wrong one and don't know it. So we built the tool we wished already existed: one place, free, that turns a tape-measure reading into a real answer, no matter where in the world you're shopping from.

What we believe

Finding your size shouldn't require an account, a credit card, or ten browser tabs comparing charts. It should take thirty seconds, work on any phone, and give you a straight answer — with the honesty to say when a result is an estimate rather than a guarantee.

What we're building toward

7TShirts today covers t-shirts, shirts, pants, bras, shoes, kids' sizing, rings and hats. We're actively expanding into size charts, brand-to-brand converters, and tools for tailors and small apparel businesses — all under the same principle: free first, accurate always, no sign-up required.

Get in touch

Found a size that felt off? Have a brand you'd like added? We'd genuinely like to hear from you — visit our Contact page.