Alfie Pet by Petoga Couture - Kris Support & Rehabilitation Lifting Harness Please note that this listing is for Medium size. Harness best fits pets with waist girth 13.75"-16.5", hind leg up to 9.5" and weight up to 7kg. Leash is 11.75"-22.5" in length and 0.75" wide. Sizing for each dog is unique. We highly recommend you measure your pet precisely with a flexible tape measure to ensure the best fit. Contact us if you have question. We are happy to help. This lifting harness offer a safe and convenient way for older, arthritic, injured, or invalid dogs to experience life to the fullest. Rear-Only Harness lets you gently lift and support your dog's hindquarters resulting in less stress than similar devices that lift only from either the legs or abdomen. Excellent for assisting pets up stairs, into vehicles, onto furniture, outside for a bathroom break, or to provide some assistance when taking a walk. Perfect for rehabilitation of dogs after injury or surgery.