| UK | FOOT LENGTH (CM) | US - Men | US - Women | EU | JP |
| 5 | 23 | 5.5 M | 6.5 W | 38 | 23.5 |
| 5.5 | 23.5 | 6 M | 7 W | 38 2/3 | 24 |
| 6 | 24 | 6.5 M | 7.5 W | 39 1/3 | 24.5 |
| 6.5 | 24.5 | 7 M | 8 W | 40 | 25 |
| 7 | 25 | 7.5 M | 8.5 W | 40 2/3 | 25.5 |
| 7.5 | 25.5 | 8 M | 9 W | 41 1/3 | 26 |
| 8 | 26 | 8.5 M | 9.5 W | 42 | 26.5 |
| 8.5 | 26.5 | 9 M | 10 W | 42 2/3 | 27 |
| 9 | 27 | 9.5 M | 10.5 W | 43 1/3 | 27.5 |
| 9.5 | 27.5 | 10 M | 11 W | 44 | 28 |
| 10 | 28 | 10.5 M | 11.5 W | 44 2/3 | 28.5 |
| 10.5 | 28.5 | 11 M | 12 W | 45 1/3 | 29 |
| 11 | 29 | 11.5 M | 12.5 W | 46 | 29.5 |