Size XS: The size XS cat harness adapts to the circumference of your little one's neck (neck: 8.5-11 inches, chest: 13.5-16 inches) Before purchasing, we suggest that you measure your cat or puppy's neck and chest. WALK WITH YOUR CAT: it includes a leash and a harness, this harness for cat is perfect for cats and small dogs. Comes with tether and leash, perfect for your cat's walks on the grass. Easy to put on and take off: This cat carrier with quick release buckle ensures easy on and off. easy removal. Just slip her head over and tuck the sides behind her legs. Safety Vest: Cat harness reflective strips make your cat visible in the dark, great for walking at night, outdoor dawn, dusk, night or on foggy and rainy days. ADJUSTABLE VEST: The adjustable chest and neck straps of the Adjustable Kitten Harness are perfect for your furry friend. No more problems with your growing dog.