snout width: 25-30cm. Please refer to the picture for the correct size. Measure the circumference of the dog's mouth and neck. It is important to order the correct size.^ This large dog muzzle is made of thick metal: It is rust-resistant, durable and contains breathable leather for comfort and strength.^ The joints of the metal muzzles are fixed by rivets and are not easy to fall off,: Dogs cannot remove it with their paws. It has adjustable straps that comfortably fit the size of the dog.^ This metal dog muzzle lets in a lot of air: which is essential for the comfort and health of your pet. It allows him to gasp and drink water, but prevents him from biting other dogs.^ Our metal dog muzzle offers maximum safety: maximum comfort and maximum protection. The installation is very easy.