Size Chart
XXS: Chest Girth: 11.02-14.56 inches ;Back Length: 5.9 inches; Weight:0-5.51 lb
XS: Chest Girth: 11.81-16.53 inches ;Back Length: 8.26 inches; Weight:5.51-8.81. lb
S: Chest Girth: 16.14-20.86 inches ;Back Length: 10.23 inches; Weight:8.81-15.43 lb
M: Chest Girth: 16.14-24.8 inches;Back Length:11.8inches ;Weight:15.43-22.04 lb
L: Chest Girth: 19.68-29.52 inches;Back Length:13.77 inches;Weight:22.04-44.09 lb
XL: Chest Girth: 27.55-37.4 inches ;Back Length: 17.71 inches ;Weight:44.09-77.16 lb
XXL: Chest Girth: 34.64-48.81 inches; Back Length:18.89 inches; Weight: 77.16-121.25 lb