Size / Fitflop Men's
| US | UK | EU | JAPAN (CM) |
| 8 | 7 | 41 | 25.8 |
| 9 | 8 | 42 | 26.6 |
| 10 | 9 | 43 | 27.5 |
| 11 | 10 | 44 | 28.3 |
| 12 | 11 | 45 | 29.2 |
| 13 | 12 | 47 | 30 |
| US | UK | EU | JAPAN (CM) |
| 8 | 7 | 41 | 25.8 |
| 9 | 8 | 42 | 26.6 |
| 10 | 9 | 43 | 27.5 |
| 11 | 10 | 44 | 28.3 |
| 12 | 11 | 45 | 29.2 |
| 13 | 12 | 47 | 30 |