XS: For necks 8-10 in. L x 1/2 in. W
S: For necks 10-12 in. L x 3/4 in. W
M: For necks 13-16 in. L x 1 in. W
L: For necks 17-20 in. L x 1.18 in. W
*Each dog is unique, please measure your dog's neck to find the correct size and ensure a proper fit. We recommend allowing for 2 fingers to be placed between your pup's neck and a measuring tape to allow for a comfortable fit. If your pup usually wears a size Medium, this does not mean a size Medium will fit as all designers use their own sizing.