Please have a look here for the measurements and some common dog breeds. Large Fits 2.25" To 2.75″ / 5.715 To 7 cm - wide paw Common Breeds: Australian Shepherd, Beagle, Border Collie, Boxer, Corgi Small Fits 2″ / 5 cm - wide paw Common Breeds: Chihuahua, Maltese, Pomeranian, Yorkie, Boston Terrier