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.With reflective straps provide visibility and gives you peace of mind in walking your dog in the dark. 1.Harness Object : The Legs support Harness is designed to help your elderly, disabled, or injured dog, who are unable to navigate the stairs, has a difficult time getting up and down, needs help walking and at any risk of falling. 2.Lifesaver: The help them get up from lying down,stabilize both the gait and spine. 3.Postoperative Rehabilitation : This Hip lifter is a helpful rehabilitation strap to help your furry pug who are post-op surgery of knee,CCL (ACL),TPLO,hip replacement and so on.They all have some trouble with the their back legs. The back-saver harness assist your dog while recovering from surgery. 4.Soft & durable :The dog mobility harness is very fluffy and comfortable for your dog to wear,won't chafe your pups underbelly. The belly sling carrier outer cove with oxford fabric, it is sturdy for large dog. 5.Easy to Use:The dog lift support harness is great with the padded handles, so its cushion works great for all dog owners can give your dog a assist lifting with easy.The dog body hoist is washable and easy to carry or storage when not use it, you can roll it up.