Measure your child's feet, then choose the correct shoe size:
| CM | 19 | 19.5 | 20 | 20.5 | 21 | 21.5 | 22 | 22.5 | 23 | 23.5 | 24 | 24.5 | 25 | 25.5 |
| UK | 13 | 13.5 | 1 | 1.5 | 2 | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 |
| JPN | 20 | 20.5 | 21 | 21+ | 21.5 | 22 | 22+ | 22.5 | 23 | 23.5 | 24 | 24.5 | 25 | 25.5 |
| USA | 13.5 | 1 | 1.5 | 2 | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 | 7 |
| EU | 31 | 32 | 33 | 33.5 | 34 | 35 | 35.5 | 36 | 36.5 | 37 | 38 | 38.5 | 39 | 40 |