Soft Dog Muzzle is a strong, soft and flexible muzzle that allows drinking, panting and vomiting. This muzzle will decrease the chances of biting, chewing and barking. Additionally this muzzle is difficult for dogs to dislodge. Size - Measurement Around Snout: 0-4-4.5" 1-5-5.5"2-5.5-5.75"3-7-7.5" 4-9.5-10"5-8.5-9"5XL-10.5-11"8-11-11.5" | Hamilton Products Inc. H.P. Mugz Nylon Dog Muzzle in Black | Size 5