Muzzle Sizing (U.S. and Canada only)
Your horse's bit size is the best estimate for Greenguard muzzle size. See the chart below for sizing. Note that this sizing guide is for U.S. and Canada only. These muzzles should fit much larger than traditional grazing muzzles. If your horse is between sizes, we recommend getting the larger size because if the muzzle is too small it may rub.
CAUTION: Horse and Pony sizes may not fit in some types of automatic waterers if the diameter is less than 10 inches. Make sure the muzzle will fit in your horse's water source before ordering. See our article Automatic Waterers and Your Greenguard Muzzle or click here for a quick reference table of compatible waterers.
Halter Sizing (U.S. and Canada only)