Ah yes and an afterthought as well on the matter is the size #1 dog muzzle is best for me because of the size of my flaccid girth.. Here is a chart from an online seller with the sizes of the muzzles. That is fairly accurate with all muzzles.
1. Size 0 - fits snout size 4 1/2”
(0 is for Miniature Dachshunds, Miniature Poodles, Yorkshire Terriers, & similar sized dogs)2. Size 1 - fits snout size 5”
(1 is for Jack Russell Terrier, Standard Dachshund, West Highland White, Whippets, & similar sized dogs)3. Size 2 - fits snout size 5 1/2”
(2 is for Beagles, Border Collies, Cockers, Springer Spaniels, Standard Poodles, & similar sized dogs)4. Size 3 - fits snout size 7”
(3 is for Dobermans, German Shepherds, Labs, Setters, Staffordshire Bull Terriers, & similar sized dogs)5. Size 4 - fits snout size 8”
(4 is for Bloodhounds, Great Danes, Great Pyrenees, St. Bernard, Wolfhounds, & similar sized dogs)6. Size 5 - fits snout size 8 1/4”
(5 is for Bull Mastiffs, Rottweilers, & similar sized dogs)7. Size 3XL - fits snout size 10 1/2”
(3XL is for Boxers & similar sized breeds with wide, short snouts)8. Size 4X - fits snout size 10 3/4”
(4X is for extra large Bloodhounds, Great Danes, Great Pyrenees, & similar sized dogs)9. Size 5LX - fits snout size 10 1/4”
(5XL is for extra large Bull Mastiffs, Rottweilers, & similar sized dogs)