| Foot Length (cm) | Approx. US Size | Approx. UK Size | Approx. EU Size | Age (Approx.) |
|---|---|---|---|---|
| 21 cm | US 1Y | UK 13 | EU 32 | 6–7 years |
| 22 cm | US 2Y | UK 1 | EU 33 | 7–8 years |
| 23 cm | US 3Y | UK 2 | EU 34 | 8–9 years |
| 24 cm | US 4Y | UK 3 | EU 36 | 9–10 years |
| 25 cm | US 5Y | UK 4 | EU 37 | 10–11 years |
| 26 cm | US 6Y | UK 5 | EU 38 | 11–12 years |
| 27 cm | US 7Y | UK 6 | EU 39 | 12+ years |
| 28 cm | US 8Y | UK 7 | EU 40 | Teenagers |
| 29 cm | US 9Y | UK 8 | EU 41 | Teenagers |
| 30 cm | US 10Y | UK 9 | EU 42 | Teenagers |
