NoteSizes do not directly match your pet's breed, size and weight. Please measure your pet before purchasing and refer to the second attached chart to choose the right size! Size M Neck Circumference: Neck Circumference: 10.23-13.38inches (26-34cm), Chest Circumference: 14.96-16.53 inches (38-42cm) Packing list: 1 x size M kitten walking sweatshirt, 1 x 4.92 feet walking nylon leash (59 inches/150 cm) We believe in our products and want you to love them as much as we do. AdjustableDesigned for convenience and functionality, the vest is designed to be easy to put on and take off. Adjustable design, the adjustable straps can bring your cat some room to grow, which will not cause your cat to grow up and not be able to use this pet harness. Anti-EscapeThis cat harness is made of adjustable straps and snaps, which can be very good for your cat to wear and snugly fit. It also protects your cat from being stretched and uncomfortable. It is a great way to get your cat to accept a pet harness. COMFORTABLE OUTDOOR HOLDERThis comfortable cat holder has a soft texture and is made of breathable mesh, which can keep your cat cool and not stuffy. And it is lightweight (about 85g), which won't make your cat feel heavy to walk. Suitable for daily outings, walks, jogs and any outdoor recreational activities