Large and spacious for my single adult rat. Unfortunately she’s already chewing through the wood on the top and the lid broke the first time I went to clean it or may have been broken upon arrival and only noticed when first used. The mental on top is flimsy and I’m worried it will need DIY replacing just like the rest of the lid. Cuter then having a aquarium since it looks nicer and we can’t have a wire cage since I also have cats.