M: suitable for dogs with a chest measurement of 20.4-23.6 inches (51.8cm--59.9cm), a neck measurement of 17.7-21.2 inches (44.9cm--53.8cm), and a weight range of 22-33 lbs (9.9kg--14.9kg). (Size Chart on the left) Size is very important, please confirm it. DIRECTIONS ON THE LEFT. SUPER COMFY: Dual neck and chest adjustable straps with soft no-chafing sleeves make this your pet's favorite harness. COMFORTABLE DURABLE FABRIC: Breathable and soft, your pet deserves the best. NON-CHOKING: Will not harm pets' sensitive throat or trachea unlike collars, especially if your dog pulls or lunges. REFLECTIVE threads sewn all around ensure safety visibility at night. PUTS ON EASILY: Wearing it is a joy for you and your pet. No need to lift a paw or step in to put on. Literally clip-on and go. Taking it off is just as easy. Quick-release, heavy-duty buckles provide ultimate convenience. NO-TANGLE: Will not cause the leash to tangle, unlike collar types. STURDY SAFETY HANDLE: Gain immediate control of your dog in training emergencies. Helps dogs out of water, physically challenged pets into vehicles, or secures to car safety belts easily. THE LEASH IS FREE.