Enjoy a stroll with your canine with this walking collar. The collar provides gentle guidance and eliminates pulling to keep your dog comfortable. Head out for a walk with your four-legged friend with the Top Paw Training Walking Collar for Dogs. *Note - This is not a muzzle and does not hinder a dog from opening his mouth* Collar Sizing Help: Small: Border Terrier, Cairn Terrier, Jack Russell, Shelti, Standard Dachshund, Welsh Corgie, Westie, Whippet Medium: Basenji, Beagle, Border Collie, Cockers, Saluki, Schnauzer, Standard Poodle, Welsh Terrier Large: Afghan, Airedale, Boxer, Briard, Chow Chow, Dalmation, Doberman, German Shepherd, Greyhound, Husky, Retrievers, Setters, Springers, Weimaraner Measure the circumference of your dog's neck using a cloth measuring tape positioned where his collar sits. The resulting measurement plus 2" is your dog's neck size. The collar should be snug with enough room to fit 2 fingers between your dog's neck and his collar. Tip: If you do not have a cloth tape measure, try using a piece of string and then measure the string with a ruler. The width should be proportional to your dog's size: 1"+ width for large dogs, 3/4" for medium dogs, 1/2" or under for small or toy dogs.