| Kids US Size | Length (cm) | Length (in) | UK Size | EU Size | US Men | US Women |
| 3.5 | 21.5 | 8 1/2 | 3 | 35.5 | 3.5 | 5 |
| 4 | 22 | 8 5/8 | 3.5 | 36 | 4 | 5.5 |
| 4.5 | 22.5 | 8 7/8 | 4 | 37 | 4.5 | 6 |
| 5 | 23 | 9 | 4.5 | 37.5 | 5 | 6.5 |
| 5.5 | 23.5 | 9 1/4 | 5 | 38 | 5.5 | 7 |
| 6 | 24 | 9 1/2 | 5.5 | 38.5 | 6 | 7.5 |
| 6.5 | 24.5 | 9 5/8 | 6 | 39 | 6.5 | 8 |
| 7 | 25 | 9 7/8 | 6.5 | 40 | 7 | 8.5 |
