This is a carrier bag for small dogs. My 3.5kg female dog used it twice for travel. I'm selling it because I bought another carrier bag. It has pockets on both sides, and a pocket on the side for a water bottle, which is convenient. Your dog can be put in from the top and the side. It has a mesh lid, and another lid on top of that. The top lid can be rolled up and secured when open. There is a safety lead inside. The size of the carrier bag is: 18cm x 39cm x 25cm