IDS Boys/Kids Shoe Size Chart
| UK (IDS) | European | American (US) | Centimeters |
| 1 | 33 | 2 | 20.8 |
| 1.5 | 34 | 2.5 | 21.3 |
| 2 | 34.5 | 3 | 21.7 |
| 2.5 | 35 | 3.5 | 22.2 |
| 3 | 36 | 4 | 22.6 |
| 3.5 | 36.5 | 4.5 | 23.1 |
| 4 | 37 | 5 | 23.5 |
| 4.5 | 37.5 | 5.5 | 24 |
| 5 | 38 | 6 | 24.4 |
Tip: Always measure both feet – choose the larger length if there's a difference.
