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 allows for ample airflow, which is essential for the comfort and health of your pet. It allows the dog to pant and drink water, but prevents biting. Our metal dog muzzle offers maximum safety, comfort and protection. Installation is very easy.