Reference Weight
XS:Suitable for 1-2 pound dogs
S:Suitable for 3-4 pound dogs
M:Suitable for 5-7 pound dogs
L:Suitable for 8-9 pound dogs
XL:Suitable for 11-14 pound dogs
XXL:Suitable for 15-22 pound dogs
3XL:Suitable for 33-38 pound dogs
4XL:Suitable for 44-55 pound dogs