SMALL SIZE- Small Chest:9-11"(23-28cm),Weight:3-6lb(1-3kg).It is suitable for most kittens and small animals.Please measure your cat carefully and refer to the size chart before ordering,including: cat harness and leash set(nylon leash 150cm),ATTENTION:suggestion choose a small size to avoid too big. SOFT BREATHABLE MATERIAL- The Vest harness is made of lightweight breathable mesh wrapped around the back of the chest, the pressure on the chest is even and safe to prevent NO pulling and suffocation and protect the cat's fragile neck without pain. ULTRA LIGHTWEIGHT- the cat vest harness weighs less than 71g, the same weight as a car key. Your cat can walk freely after wearing it and absolutely like it, material that will not overheat in the heat and retains heat in winter . Escape Proof Outdoor Tableware- This really convenient k leash pet harness, the chest circumference is adjustable, which allows for a just right fit for your flexible cat, and both sides have a sturdy safety buckle, suitable for daily walking, jogging, exercise and all outdoor recreation, activities. EASY TO WEAR- This step-in cat harness is easy to put on and take off with the back buckle and magic tape. Two durable D-rings can be attached to the leash when walking and exercising. Super easy to use