Size: S Length: 23cm Chest: 32cm Neck: 21cm The belly area opens up like in the 7th photo. 100% cotton I put it on once, but it was too big for my dog (thin, with little fur, 1.5kg) and he didn't like having his legs in it, so I'm selling it. It's like a sweatshirt, so it seems good for when it's cold. I will fold it compactly and ship it.