Mikki Muzzles Mikki Muzzles allow the dog to pant and drink. A strong nylon muzzle which is soft and flexible. Adjustable straps with quick-fit catch. Inhibits, chewing and barking but still allows panting and barking. Should not be used during strenuous exercise NoseBand Product Sample Of Breed Measurement Cm Size 0 Yorkies, Cavalier Spaniels,Miniature Breeds 10 Size 1 Whippets, Westies, Jack Russells, Dachshunds 12 Size 1x1 Larger Size of 1 13 Size 2 Beagles, Springers, Cockers, Poodles (Std) 14 Size 2x1 Larger Size of 2 16 Size 3 Labradors, GSD, Dobermans, Retrievers 18.5 Size 3x1 Larger Size of 3 19.5 Size 4 Wolfhounds, Great Danes, St. Bernards 24 Size 4x1 Larger Size of 4 28.5 Size 5 Rottweilers, Bull Mastiffs 21.5 Size 5x1 Larger Size of 5 26.5 Size 8 Boxer 30 Size 10 Staff, Bull Terriers 22