| US | UK | Europe | Inch | CM |
| 6 | 5.5 | 39 | 9.25 | 23.5 |
| 6.5 | 6 | 39 | 9.5 | 24.1 |
| 7 | 6.5 | 40 | 9.625 | 24.4 |
| 7.5 | 7 | 40-41 | 9.75 | 24.8 |
| 8 | 7.5 | 41 | 9.9375 | 25.4 |
| 8.5 | 8 | 41-42 | 10.125 | 25.7 |
| 9 | 8.5 | 42 | 10.25 | 26 |
| 9.5 | 9 | 42-43 | 10.4375 | 26.7 |
| 10 | 9.5 | 43-44 | 10.5625 | 27 |
| 10.5 | 10 | 43-44.5 | 10.75 | 27.3 |
| 11 | 10.5 | 44-45 | 10.9375 | 27.9 |
| 11.5 | 11 | 44-45 | 11.125 | 28.3 |
| 12 | 11.5 | 45-46 | 11.25 | 28.6 |
| 13 | 12.5 | 46-47 | 11.5625 | 29.4 |
| 14 | 13.5 | 47-48 | 11.875 | 30.2 |
| 15 | 14.5 | 48-49 | 12.1875 | 31 |
| 16 | 15.5 | 51 | 12.63 | 32.1 |
| 17 | 16.5 | 52 | 13.00 | 33 |