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. ADJUSTABLE VEST HARNESS- with buckle that can endure a large load-bearing capacity to prevent your pet from being ripped off, and you can easily adjust the harness to give your cat the perfect fit, escape-proof through the secure jacket design. EASY ON AND OFF- This step-in cat harness is easy on and off with back buckle and magic tape. Two durable D-rings can be attached to the leash when walking and exercising. Super easy to serve.