Dog Collar Sizes and Fit
Small - Neck: 8-12 inches, Width: 5/8 inch
Medium - Neck: 12-18 inches, Width: 5/8 inch
Large - Neck: 18-26 inches, Width: 1 inch
Dog Harnesses Sizes and Fit
Extra Small - 5/8 inches strap, 16-19 inches Girth
Small - 5/8 inches strap, 19-23 inches Girth
Medium - 1 inch strap, 22-28 inches Girth
Large - 1 inch strap, 28-36 inches Girth