I bought this box for my 3 degus, as they had outgrown the birdbox that i used for them when they were babies. This box fits a chinchilla and 3 degus easily. It is great quality and size, but the only thing is that you have to figure out how to put it together yourself, as there are no instructions. This is really easy to do, but it was a little hard to slot some of the pieces together at the end, as it uses no nails/glue, so you need to force the pieces into a really tight fit. After this though, it is perfect, and as the box has no bottom, it is really easy to clean and has no problem with urine stains, which is a plus with rodents :)