| UK | FOOT LENGTH (CM) | US - Men | US - Women | JP |
| 5 | 23 | 5.5 M | 6.5 W | 23.5 |
| 5.5 | 23.5 | 6 M | 7 W | 24 |
| 6 | 24 | 6.5 M | 7.5 W | 24.5 |
| 6.5 | 24.5 | 7 M | 8 W | 25 |
| 7 | 25 | 7.5 M | 8.5 W | 25.5 |
| 7.5 | 25.5 | 8 M | 9 W | 26 |
| 8 | 26 | 8.5 M | 9.5 W | 26.5 |
| 8.5 | 26.5 | 9 M | 10 W | 27 |
| 9 | 27 | 9.5 M | 10.5 W | 27.5 |
| 9.5 | 27.5 | 10 M | 11 W | 28 |
| 10 | 28 | 10.5 M | 11.5 W | 28.5 |