Sizing Measurements: There are 3 important measurements when sizing a mask for your horse or pony. The distance between the eyes, the circumference toward the bottom of the cheek bone (depending upon your horse's conformation) and the length from behind the poll to the center of the face using the bottom of the cheekbones for a reference.
***Measurements are approximate as masks are hand made in USA. A tight, compression-type fit is not necessary for effectiveness.
XSmall: ponies, weanlings
Small: ponies, yearlings, Morgan, Arabians
Medium: refined quarter horses, small thoroughbreds
Large: thoroughbreds, standardbreds
XLarge: larger heads, warmbloods