Convert between US, UK, EU and Japanese sizes for men, women and kids — or find your size by measuring your foot.
⚠️ Sizes vary by brand. This chart follows the common international standard, but brands cut differently — for example Nike and Adidas label their UK sizes about half a size closer to the US size than the classic chart. When in doubt, measure your foot and check the brand's own chart against the centimetre length.
Tap any row to load it into the converter above.
| 🇺🇸 US | 🇬🇧 UK | 🇪🇺 EU | 🇯🇵 JP (cm) | 📏 Foot length |
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| 🇺🇸 US | 🇬🇧 UK | 🇪🇺 EU | 🇯🇵 JP (cm) | 📏 Foot length |
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| 🇺🇸 US | 🇬🇧 UK | 🇪🇺 EU | 🇯🇵 JP (cm) | 📏 Foot length | 🎂 Approx. age |
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US kids sizes: C = child (infant, toddler and little kid), Y = youth (big kid). Youth sizes continue where child sizes end — 13C is followed by 1Y. A youth 7Y fits roughly like a men's 7 or women's 8.5. Ages are rough averages; always go by foot length for growing feet.
Convert instantly between US, UK and EU sizes plus Japanese sizing, which is simply your foot length in centimetres — the most reliable measurement of all.
Your most accurate size comes from your foot length. Use the measuring guide above — it takes two minutes with a wall, a sheet of paper and a ruler.
If your foot falls between two sizes, choose the larger one. Feet swell during the day, and a slightly roomy shoe is far more comfortable than a slightly tight one.
US widths run from narrow to extra-wide: for men, D is medium and 2E/4E are wide; for women, B is medium and D is wide. EU sizes rarely offer widths — if you have wide feet, consider going up half a size.
Children's feet grow up to a full size every few months when young. Leave about a thumb's width (~1 cm) of room in front of the longest toe, and re-measure every couple of months.
All conversions happen instantly in your browser using built-in charts — nothing you enter is sent to any server.