Thank you for viewing this item. As a bonus, you will receive an unused dog toy (please refer to the 12th attached image). My own dog is a small breed, but he was only able to use this product during his puppyhood. This is because he grew larger than the average size for his breed (lol). Therefore, it doesn't look very used. It might be better suited for a very small dog. There is no damage. The inside sides are slightly dirty. I stored it at home, but I carefully cleaned the inside, especially, before listing it. The three sides have a mesh structure, so it seems to have good ventilation. Both sides allow the dog to enter and exit. It also comes with a carrying handle and a shoulder strap (adjustable length) for convenience. There are four non-slip pads on the bottom. Bottom length: approximately 41cm, bottom width: approximately 23cm Height: approximately 28.5cm Please forgive any errors as these measurements are approximate. Thank you for your consideration.