The Petsafe Come With Me Kitty Harness gives you gentle, comfortable control of your cat or kitten, while allowing her to explore the world outside your door. The patented design allows for a gentle pressure on the leash to cradle your cat, thus, restraining any forward motion without putting pressure on the delicate throat area. The cradling effect is calming to most cats, providing safe and easy control for you. The adjustable sternum slide allows you to create a custom fit for your cat's body type, while the dual adjustment points on the girth strap allow a snug, safe fit. The shoulder straps glide through the two D-rings on the back, allowing an increase of tension (when needed) to restrain your cat without choking. The bungee leash provides a little extra "give" to soften the effect of kitty reaching the end of the leash. Measurements: Kitten or Small...9" to 11" girth, Medium or Average Cat...10 1/2" to 14" girth, Large...13" to 18" girth.