This pet carrier by Nylabone is perfect for medium sized dogs with its length of 21 inches, width of 16 inches, and height of 15.5 inches. The collapsible design makes it easy to store and transport, while the top access allows for easy loading and unloading of your furry friend. Made of durable plastic and metal, this crate is sure to last for years to come. The crate is designed for use indoors and outdoors and is perfect for travel, training, and everyday use. The side door can be opened either from the right or left. Easy to unfold but takes a little bit to collapse.