For sizing, you may find the following a helpful guide for a quick assessment inches refer roughly to length measurements. We feel that length is the best standard of measure and should be considered first. Weights given are approximate. We advise if the dog is on the slender size to purchase a size down, or if on the chubby side to purchase a size up. If in doubt, don't try the item on your pet if you would like to make a return):

XXS 1 - 2 lbs. 5" - 7"

XS 3 - 5 lbs. 8" - 10"

Small: 6 - 8 lbs. 11" - 12"

Med: 9 - 18 lbs. 12" - 15"

Large: 19 - 30 lbs. 16" - 19"

X-Lrg: 31 - 45 lbs. 20" - 23"

XXL 46 - 64 lbs. 24" - 28"