More and more conscientious dog owners are using muzzles to ensure their dog is not caught behaving badly. Also, wearing a muzzle will prevent your dog from eating poison baits in unknown areas. Our new-style Comfort muzzles are good for all dogs from the couch-potato to the pit-bull. These muzzles are strong and secure, but still comfortable for your dog to wear for longer periods. They allow good airflow for your dog to breathe and keep cool. * Dimensions are maximum nose circumference (at nose bridge) and length from nose tip to circumference point. Size Length Circ Dog Type 1 4cm 16cm Maltese, Papillon, Mini Dachshund 2 5cm 18.5cm Yorkshire Terrier, Toy Poodle 3 5.5cm 22cm Dachshund, Bichon Frise, Jack Russell 4 6.5cm 25cm Shetland Sheepdog, King Charles Spaniel, Corgi 5 7cm 27cm Cocker Spaniel, Schnauzer, Welsh Terrier 6 7.5cm 30cm Border Collie, Husky, Labrador 7 9cm 34cm German Shepherd, Rottweiler, Great Dane