Collar Sizing Chart:
Extra-Small: 5/8 inch wide fitting dogs with 9-11 necks; Leash 5/8 inch wide
Small: 3/4 inch wide fitting dogs with 11-16 inch necks; Leash 3/4 inch wide
Medium: 1 inch wide fitting dogs with 14-21 inch necks; Leash 1 inch wide
Large: 1 inch wide fitting dogs with 16-26 inch necks; Leash 1 inch wide