XXS- chest: 10.2 in., neck: 8.2 in., weight(lbs): 3-6
XS- chest: 13 in., neck: 11 in., weight(lbs): 6-10
S- chest: 14 in., neck: 13 in., weight(lbs): 11-16
M- chest: 17 in., neck: 15 in., weight(lbs): 16-30
L- chest: 20 in., neck: 18 in., weight(lbs): 30-45
XL- chest: 26 in., neck: 19.2 in., weight(lbs): 45-60
2XL- chest: 31.5 in., neck: 20 in., weight(lbs): 60-80