Pet Dog Nylon Adjustable Loop Bite Bark Control Easy Quick Fit Dog Muzzle Made of quality nylon, strong and durable Size: small, fits snout size 3.5 - 8.2 inch , neck size 10.6 - 13.7 inch Most suitable for medum and large size dogs Measure instructions: use a measurement tape and wrap it around your dogs muzzle right around the nose, the large part is your dog snout size. Besides, please measure your dog neck size to check whether the muzzle fits your dog or not Bite control stop barking easy quick fit dog muzzle