| Inches | Japan | US | UK | EU |
|---|---|---|---|---|
| 4 15/16 | 11cm | 5C | 4.5 | 21 |
| 5 1/16 | 11.5cm | 5.5C | 5 | 21.5 |
| 5 4/16 | 12cm | 6C | 5.5 | 22 |
| 5 7/16 | 12.5cm | 6.5C | 6 | 22.5 |
| 5 9/16 | 13cm | 7C | 6.5 | 23.5 |
| 5 12/16 | 13.5cm | 7.5C | 7 | 24 |
| 5 15/16 | 14cm | 8C | 7.5 | 25 |
| 6 1/16 | 14.5cm | 8.5C | 8 | 25.5 |
| 6 4/16 | 15cm | 9C | 8.5 | 26 |
| 6 7/16 | 15.5cm | 9.5C | 9 | 26.5 |
| 6 9/16 | 16cm | 10C | 9.5 | 27 |
| 6 12/16 | 16.5cm | 10.5C | 10 | 27.5 |
