Junior Originals
(Measurements are in CM)
| UK Size | Insole Length | Max Calf Circumference | Topline Circumference | Boot Height |
| J12 | 19.80 | 32.22 | 33.97 | 26.03 |
| J13 | 20.50 | 32.70 | 34.60 | 26.70 |
| J1 | 21.10 | 33.17 | 35.24 | 26.67 |
| J2 | 21.80 | 33.49 | 35.71 | 26.98 |
| J3 | 22.50 | 34.05 | 36.11 | 27.46 |
| J3H | 23.10 | 34.60 | 36.51 | 27.90 |
| J4 | 24.27 | 35.24 | 37.14 | 28.57 |
Big Kids
Hunter Boots Australia uses UK sizing
| Age Range | UK Size | US Size | EU Size |
| 6-7 yr | J12 | 13c | 31 |
| 8 yr | J13 | 1 | 32 |
| 9 yr | J1 | 2 | 33 |
| 10 yr | J2 | 3 | 34 |
| 11-12 yr | J3 | 4 | 35/36 |
| 13 yr | J4 | 5 | 37 |