Type:Soft Dog Muzzle Material:Rubber Feature:Adjustable straps,easy on and off It will prevent your dog from wound licking,eating of rocks,garbage, poison, etc Prevents injuries from dog fights Size Mouth Length Fit for 1 8.0"(20cm) 3.5"(9cm) Bichon firse,Maliese terrier,Poodie toy,Dachshund,Yorkshire terrier 2 9.5"(24cm) 4.3"(11cm) Border terrier,Buhund,Lakeland terrier,Fox terrier, Whippet,Schnauzer min,Jack Russell 3 11.0"(28cm) 4.7"(12cm) Australian cattle dog,Border collie,Poodie std,Schnauzer,Weish terrier 4 12.5"(32cm) 5.1"(13cm) Samouyed,Elkhound,Springer spaniel,Pointers,Kerry blue terrier 5 14.0"(36cm) 5.5"(14cm) Labrador,Siberian,Alaskan mafamute,Golden retriever,German shepherd 6 15.5"(40cm) 5.9"(15cm) Japanese akita,Pit bull terrier, Pyrenan M/dog,Boxer,Mastiff.