Size - If your pet's chest length is large, you can choose the size according to the chest length, if your dog's back length is larger, you can choose the size according to the back length. Dog Coats with Harness - This dog winter coat waterproof jackets with built-in dog harness, no need additional dog vest harness, it is very confident for outdoor winter walk on your dogs. WATERPROOF AND WARM - The dog coat for small and medium dogs is made of polyester and fleece lining, windproof and waterproof, keep your dogs warm and dry, warm, winter warm and cold for your dogs. Easy to carry: this dog winter coat is easy to wear with the zipper Dress up great for Chihuahua, Yorkie, Poodle, Maltese, Pomeranian, Shih Tzu, Jack Russel, Pug. Size: M: chest circumference: 40cm back length: 40cm (Please allow 1-2cm error due to manual measurement) 1 piece