| UK | EU | Calf Width | Calf Height |
| 3 | 37 | 34.5cm | 43.5cm |
| 4 | 38 | 35cm | 44cm |
| 5 | 39 | 35.5cm | 44.5cm |
| 6 | 40 | 36cm | 45cm |
| 7 | 41 | 37cm | 46cm |
Size Guide Hy Equestrian Long Riding Boots
| UK | EU | Calf Width | Calf Height |
| 3 | 37 | 34.5cm | 43.5cm |
| 4 | 38 | 35cm | 44cm |
| 5 | 39 | 35.5cm | 44.5cm |
| 6 | 40 | 36cm | 45cm |
| 7 | 41 | 37cm | 46cm |