Line A measures from the middle of the poll down the front of the face to the tip of the nose.
Line B measures from the middle of the poll down the middle of the head to just above where a nose band or halter would sit.
Line C measures from the middle of the poll behind the ears and goes below the jaw where a throat latch would go just to the middle of the underneath of the jaw.
| DRAFT | LARGE/WB | REGULAR HORSE | ARABIAN / SMALL HORSE | PONY | MINI / MINI B | MINI A | |
|---|---|---|---|---|---|---|---|
| A | 32" | 32" | 27" | 25" | 23" | 21" | 17" |
| B | 23" | 20" | 18" | 16" | 16" | 14" | 11" |
| C | 26" | 24" | 22" | 21" | 19" | 17" | 13" |