| US Women |
Heel to toe (cm) |
UK | EUR | JP (cm) |
US Men |
| W6 | 22 | 3.5 | 36 | 23 | |
| W6.5 | 22.5 | 4 | 36⅔ | 23.5 | |
| W7 | 23 | 4.5 | 37⅓ | 24 | |
| W7.5 | 23.5 | 5 | 38 | 24.5 | |
| W8 | 24 | 5.5 | 38⅔ | 25 | |
| W8.5 | 24.5 | 6 | 39⅓ | 25.25 | M7 |
| W9 | 25 | 6.5 | 40 | 25.5 | M7.5 |
| W9.5 | 25.25 | 7 | 40⅔ | 26 | M8 |
| W10 | 25.75 | 7.5 | 41⅓ | 26.5 | M8.5 |
| W10.5 | 26.25 | 8 | 42 | 27 | M9 |
| W11 | 26.5 | 8.5 | 42⅔ | 27.5 | M9.5 |
