Size conversions
Every conversion pair on this site, grouped by garment. Pick your starting system and the one you need.
Each pair below is its own page for a reason: a US-to-EU shoe conversion and a US-to-UK shoe conversion break down completely differently, because EU sizing is built from a French Paris-point unit while UK sizing is built from an English barleycorn unit — two separate historical measuring systems, not two labels on the same scale. Rather than one generic size-lookup, this index sends you to the page that explains the actual mismatch for your specific pair, so the number you land on comes with the context to judge whether it's precise enough to trust for a purchase you can't try on first.
If you're not sure which garment or direction you need yet, the size charts show every system for a garment side by side on one page, and the measuring guides help you get an accurate figure to convert in the first place, rather than converting a size you're only guessing at.
Women's Shoe Size
Men's Shoe Size
Belt Size
School Uniform Size
Youth Jersey Size
Wetsuit Size
Frequently asked questions
Why is each conversion pair a separate page instead of one universal calculator?
Because the real mismatch differs by pair — a shoe conversion crosses different last-measuring units, a jeans conversion crosses stretch-fabric and size-deflation habits, a bra conversion crosses cup-letter conventions — and one generic calculator can't surface any of that context.
Which direction should I pick if I'm converting for a gift?
Pick the direction that matches where the recipient will wear the item, not where you're shopping from — a US shopper buying a UK-sized gift for a UK recipient wants the US-to-UK page, since that's the pair explaining the offset relevant to the final size.
Do these conversions apply to secondhand or vintage items?
Treat vintage sizing as its own case — sizing conventions have shifted over decades (especially through vanity sizing), so a vintage US 8 doesn't necessarily match a modern US 8, and the standard conversion tables reflect current conventions.