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Convert shoe sizes between US, UK, EU, and CM systems for men, women, and kids.
Shoe size is a standardized numerical system that corresponds to the length of the foot. The US, UK, and EU systems all use different scales — a US Men's 10 equals a UK 9.5 and an EU 44. The CM (centimeter) system used in Japan and Korea directly measures foot length.
| US | UK | EU | CM |
|---|---|---|---|
| 7 | 6.5 | 40 | 24.7 |
| 8 | 7.5 | 41.5 | 25.3 |
| 9 | 8.5 | 42.5 | 26.0 |
| 10 | 9.5 | 44 | 26.7 |
| 11 | 10.5 | 45 | 27.3 |
| 12 | 11.5 | 46 | 28.0 |
| 13 | 12.5 | 47 | 28.7 |
| US W | UK | EU | CM |
|---|---|---|---|
| 5 | 3 | 35.5 | 22.0 |
| 6 | 4 | 36.5 | 22.7 |
| 8 | 6 | 39.5 | 24.3 |
| 9 | 7 | 41 | 25.0 |
| 10 | 8 | 42 | 25.7 |
| 11 | 9 | 43 | 26.3 |
Formula
EU Size ≈ Foot Length (cm) × 1.5 + 1.5Foot Length (cm) = the length of the foot from heel to longest toe, measured in centimeters
1.5 = scaling factor based on the Paris Point system (1 Paris Point = 2/3 cm)
EU Size = the European shoe size number (approximate — actual sizing uses lookup tables)
Worked Example
27cm foot → what shoe size?
Did you know? The EU (Paris Point) shoe sizing system is based on units of 2/3 of a centimeter — each whole EU size equals approximately 6.67mm of additional foot length (source: ISO 9407).
Sources
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