A cross-reference of shoe sizes between the four major sizing systems used worldwide. Each row gives a US size with its equivalent UK, EU (continental), and JP (Japanese cm) sizes, plus the actual foot length in inches and centimeters. Covers men, women, kids, and infant ranges.
Pro tip: EU sizes use foot length in Paris points (1 Paris point = 2/3 cm), which is why an EU 41 is roughly 27.3 cm. JP sizes are foot length in cm directly — far easier to think about than the US/UK numerical jumble.
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About the International Shoe Size Reference
Shoe sizing is one of the most fragmented retail standards in the world. The same physical foot length can map to a US 9, UK 8.5, EU 42, and JP 27. None of the systems agree on a base unit, none of them are linear in the same way, and most online conversion charts disagree on edge cases. This dataset uses the widely-cited Brannock device baseline plus the Japanese JIS S 5037 standard.
Common Use Cases
International e-commerce shoe retailers building size mappers, dropshippers translating supplier sizes to a local market, expatriates buying shoes online from a different country, gift-buyers ordering shoes abroad, footwear-comparison apps, and writers building lifestyle and travel content for international audiences.
Column Reference
- category — mens, womens, kids, or infant.
- us_size, uk_size, eu_size, jp_size_cm — equivalent sizes across the four standards.
- foot_length_in / foot_length_cm — the actual foot length the row corresponds to, in inches and centimeters.
Sizing System Origins
The US system stems from English shoemaker iron measurements, where one size equals 1/3 inch starting from a fixed point. The UK system uses the same 1/3-inch step but starts a half-size lower than US mens. The EU system uses Paris points (2/3 cm per size). Japan simply uses centimeters of foot length, which is the most user-friendly system but has no half-size half-step pattern.
Mens vs Womens vs Kids
US mens and womens sizes differ by 1.5 (a womens 8.5 equals a mens 7). UK sizes are unisex (so UK kids and adults overlap at the boundary). EU sizes use the same number for both sexes, which is why so many European brands sell mens, womens, and unisex shoes from a single sized inventory.
