SIZE MEDIUM DOG HARNESS: Chest Girth 17-25, Straps width 3/4. Suitable for medium breed dogs like Australian Shepherd, Boxer, Boston Terrier, Bulldog, Dachshund, Heeler, Puggle, etc. Please measure the size carefully before purchasing this present for your dog.SAY GOODBYE TO PULLING: Attach your leash to the loop of this no pull dog harness to allow your dog to walk in a straight line without twisting or straining, and you can also stop pulling by gently tightening around the chest.EASY PEASY: This lightweight dog harness is easy to put on and take off with its upgraded design and fast-release buckles. Just put your dog's front feet through the two holes of dog harness, then buckle the buttons on the back, and here you go!PERFECT FOR ALL DOGS: Excellent control, premium adjustability and maximum comfort and safety, making this dog halter harness very suitable for all breeds of small, medium and large dogs. And please leave a little space between your dog and dog vest harness to provide comfortable wear for your dog.WHAT YOU GET: Premium dog harness, worry-free lifetime warranty and friendly customer service. If there are any problems, please send us your order number, defect details and some photos of this item. We will arrange an exchange or refund your purchase as soon as possible.