(Measure just above the nose.)
1. Measure the circumference midway between the tip of the nose and eyes. Add 2 for small/medium breeds and 3" for large breeds.
2. Measure neck size at base of neck, just under the ears.
3. Measure jaw length from the nose to the throat.
Open Ended Fabric Muzzles: 1. Measure at the end of the nose, just before the nose leather (nostrils).