Nylon Muzzles for dogs and cats offer a variety of sizes for the correct fit. These nylon muzzles are lightweight, soft and flexible. They are reinforced with nylon webbing, have an adjustable head strap with a quick fix latch and won" catch or pull the hair. Washable. Sizes: 0- fits "noseband" of 4" - around the snout (Yorkies, Mini Poodles) 1- fits noseband of 4.75" - around the snout (Westies, Jack Russels) 2 -fits noseband of 5.5" - around the snout (Beagles, Spaniels) 3 -fits noseband of 7.25" - around the snout (Labs, Shepherds,Dobermans) 4-fits noseband of 9.5" - around the snout (Great Danes, St. Bernards) 5- fits noseband of 8.5" - around the snout (Rottweilers, Bull Mastiffs) 6 -(Regular Sized Cats) 7- (Large Cats) 8- fits noseband of 11.75" - around the snout (Large, Wide or Flat Faced Dogs), 2XL -fits noseband of 6.25" - around the snout (Extra Large of Size 2 Breeds) 4XL- fits noseband of 11.25" - around the snout (Extra Large of Size 4 Breeds) 5XL- fits noseband of 10.5" - around the snout (Extra Large of Size 5 Breeds)w