| UK | Heel-toe measurement | EU | US - Men's | US - Women's |
| 3.5 | 22.1 cm | 36 | 4 | 5 |
| 4 | 22.5 cm | 36 2/3 | 4.5 | 5.5 |
| 4.5 | 22.9 cm | 37 1/3 | 5 | 6 |
| 5 | 23.3 cm | 38 | 5.5 | 6.5 |
| 5.5 | 23.8 cm | 38 2/3 | 6 | 7 |
| 6 | 24.2 cm | 39 1/3 | 6.5 | 7.5 |
| 6.5 | 24.6 cm | 40 | 7 | 8 |
| 7 | 25 cm | 40 2/3 | 7.5 | 8.5 |
| 7.5 | 25.5 cm | 41 1/3 | 8 | 9 |
| 8 | 25.9 cm | 42 | 8.5 | 9.5 |
| 8.5 | 26.3 cm | 42 2/3 | 9 | 10 |
| 9 | 26.7 cm | 43 1/3 | 9.5 | 10.5 |
| 9.5 | 27.1 cm | 44 | 10 | 11 |
| 10 | 27.6 cm | 44 2/3 | 10.5 | 11.5 |
| 10.5 | 28 cm | 45 1/3 | 11 | 12 |
| 11 | 28.4 cm | 46 | 11.5 | 12.5 |
| 11.5 | 28.8 cm | 46 2/3 | 12 | 13 |
| 12 | 29.3 cm | 47 1/3 | 12.5 | 13.5 |
| 12.5 | 29.7 cm | 48 | 13 | 14 |
| 13 | 30.1 cm | 48 2/3 | 13.5 | 14.5 |