Diameter
(in Inches / CM)
 
Pet Weight
(in Lbs / Kgs)
Example Breed
XS 20" / 50 11 / 5 Chihuahua
S 24" / 60 25 / 11 Pug / Dachshund
M 28" / 70 40 / 18 Cocker Spaniel
L 31" / 80 60 / 27 Collie/Bulldog
XL 39" / 100 90 / 41 Labrador