For more information see the INSTRUCTIONS. These instructions are also included as a printed tag with each WalkingJacketTM. Standard Size Collar: 8"-11" Girth: 12"-18" Large Size Collar: 9"-13 Girth: 15"-25" How to measure your cat for a good fitPlease measure your cat when she is standing on all fours. The collar and the 2 girth straps should all be snug like a seatbelt but still comfortable.Using a string or tape measure, measure around the neck for the collar. Next, measure behind the front legs in several places, several inches apart to get an average.WalkingJackets are easy to adjust, just like a standard dog or cat collar. The standard and large sizes are the same except for the length of the black straps. The fabric portion of the WalkingJacket is used to keep the straps together and is not meant to go all around the body.
