Common Breeds: Beagle, Border Collie, Boston Terrier, English Bulldog, French Bulldog. GIRTH: 18 - 29" RECOMMENDED LEASH: 3/4" width. LARGE (Up to 75 lbs.) Common Breeds: Boxer, Dalmatian, Golden Retriever, Labrador Retriever, Weimaraner. GIRTH: 22 - 39" RECOMMENDED LEASH: 1" width, 2 ply for strong pullers. X-LARGE (75+ lbs.)