SIZE CHART:S: Length 56cm, width 14cm, suitable for dog weight:2.5-5kg, dog waist 44-48cm.M: Length 65cm, width 16cm, suitable for dog weight:5.5-12.5kg, dog waist 54-58cm.L:Length 73cm, width 18cm, suitable for dog weight:12.5-20kg, dog waist 62-66cm.VERY COMFORTABLE - Your puppy will love the comfort our lift harness provides. Soft, Strong Padding. Strong Velcro helps secure the elderly dog harness around your dog& 39;s torso.END BACK PAIN - No more bending over to pick up your heavy pet. Strap our dog lifting harness on, and you& 39;re good to goThe ease of use is really remarkable.ASSIST DOG& 39;S BALANCE - Help your dog outside with the heavy duty dog harness to assist with his/her balance. Your pup will be so thankful for the dog lift support our dog sling harness provides. Think of it as a dog mobility harness.Dog seat belt included for added support when bringing your furry friend on a road trip. Our seat belt clips to your dog& 39;s collar and clips into most seat belts. This can decrease your dog& 39;s mobility while riding in the car preventing him/her from putting unnecessary weight on legs, knees and joints.