Tip XS-XL is suitable for small dogs, and 2XL-4XL is suitable for medium and large dogs. The bust of the 2XL is 64 cm. Check the size chart before buying, measure your dog's bust and add 2-4cm to choose a size. If you don't know, you can tell your pet chest, back, and neck size, we are here to help, and we are always responsible for our customers. Easy to wear: This dog jacket features a high-quality resin large zipper on the back, which is not easy to scratch and wear, and the large zipper is also easy to put on and take off. Convenient and varied: The rear harness design is reflective and adjustable, can be attached to various dog leashes, eliminates the need to purchase additional chest straps, and can be worn together as a combination suit. Waterproof - The dog's coat is made of waterproof fabric, which is abrasion resistant and suitable for rainy days. The inside is made of composite wool fabric for warmth and comfort, and thanks to the exquisite craftsmanship and moderate thickness, your pet will not feel heavy. Windproof: The retractable high tie provides effective wind protection. The elastic band on the abdomen is designed to keep the body warm. The design of the reflective strip on the back effectively ensures the safety of walking the dog at night.