On Sizing Chart
Conversions between US, UK, Europe, Japan (cm) and Brazil sizes as published by On. Foot length is in inches. On footwear fits true to size.
Little Kids' Footwear Size Conversions (US 10.5K - 3):
| US | UK | EU | JP (CM) | BR | Foot Length (IN) |
|---|---|---|---|---|---|
| 10.5 | 10 | 27.5 | 16.7 | 25.5 | 6.6 |
| 11 | 10.5 | 28.5 | 17.1 | 26.5 | 6.7 |
| 11.5 | 11 | 29 | 17.6 | 27 | 6.9 |
| 12 | 11.5 | 29.5 | 18 | 27.5 | 7.1 |
| 12.5 | 12 | 30 | 18.4 | 28 | 7.2 |
| 13 | 12.5 | 31 | 18.8 | 29 | 7.4 |
| 13.5 | 13 | 31.5 | 19.2 | 29.5 | 7.6 |
| 1 | 13.5 | 32 | 19.7 | 30 | 7.8 |
| 1.5 | 1 | 33 | 20.1 | 31 | 7.9 |
| 2 | 1.5 | 33.5 | 20.5 | 31.5 | 8.1 |
| 2.5 | 2 | 34 | 20.9 | 32 | 8.2 |
| 3 | 2.5 | 35 | 21.4 | 33 | 8.4 |
Big Kids' / Youth Footwear Size Conversions (US 3.5 - 6.5):
| US | UK | EU | JP (CM) | BR | Foot Length (IN) |
|---|---|---|---|---|---|
| 3.5 | 3 | 35.5 | 21.6 | 33.5 | 8.5 |
| 4 | 3.5 | 36 | 22 | 34 | 8.7 |
| 4.5 | 4 | 36.5 | 22.4 | 34.5 | 8.8 |
| 5 | 4.5 | 37.5 | 22.9 | 35.5 | 9 |
| 5.5 | 5 | 38 | 23.3 | 36 | 9.2 |
| 6 | 5.5 | 38.5 | 23.7 | 36.5 | 9.3 |
| 6.5 | 6 | 39 | 24.1 | 37 | 9.5 |
To find the right size, measure your child's foot from heel to longest toe in inches and match it to the Foot Length column. Growing feet appreciate a little extra room - if between sizes, choose the larger size.
