| Size | A (IN) | A (CM) | B (IN) | B (CM) | C (IN) | C (CM) | D (IN) | D (CM) |
| Mini | 14.2 | 36.1 | 17.7 | 45.0 | 25.2 | 64.0 | 6.3 | 16.0 |
| Small Pony | 15 | 38.1 | 18.9 | 48.0 | 26.8 | 68.1 | 6.3 | 16.0 |
| Pony | 16.5 | 41.9 | 20.5 | 52.1 | 28.3 | 71.9 | 7.9 | 20.1 |
| Cob | 18.9 | 48.0 | 22 | 55.9 | 29.1 | 73.9 | 7.9 | 20.1 |
| Full | 19.7 | 50.0 | 23.6 | 59.9 | 29.9 | 75.9 | 7.9 | 20.1 |
| Extra Full | 20.5 | 52.1 | 24.4 | 62.0 | 30.7 | 78.0 | 7.9 | 20.1 |