This plastic boxer dog muzzle
has a forehead strap to help prevent the dog from getting the muzzle off.
This boxer muzzle will fit short and wide snout dogs
The size 4 will fit Boxers and some Pitbulls.
The size 4 muzzle has a 14 inch circumference.
The length on the size 4 is 2-1/2" on the top and 4" on the bottom.Size 5
The size 5 will fit large Boxers and some Mastiffs.
The size 5 muzzle has a 15 inch circumference.
The length on the size 5 is 3" on the top and 4-1/2" on the bottom.Measure the length and circumference of the dogs snout.
Add 1 to 2 inches to the dogs snout circumference.
This is a plastic muzzle and will not hold up very long on a untrained aggressive dog.