Ideal for breeds with broad snouts such as Staffies, Boxers, Rottweilers, Mastiffs, and Bullies. Made from improved TPR, which is lighter and stronger than conventional plastic muzzles. Perfect for stressful situations, vet visits, grooming, or trips on public transport. All Baskerville muzzles can be shaped and adjusted to fit your dog's morphology. To do this, immerse them in hot water for one minute and then reshape. A: Maximum length of the snout B: Maximum circumference of the snout.