With doors on each side, this versatile crate can be placed anywhere and easily opened. Plus, a large side door opens up and out of the way like a garage door, so you can leave it open to let your dog come and go. Built-in wheels and a handle make it easy to move from room to room. The blow-molded insulated base is durable and will not crack in cold weather. Because it has rounded corners and no exposed steel edges, it will not damage your vehicle’s interior or harm your dog. Folds flat for easy storage and transport. Sizes:Small (27"L x 18-1/4"W x 21-3/4"H) , Medium (36-1/2"L x 24-1/2"W x 27-1/2"H), Large (42"L x 28"W x 28"H).