I did check the measurements before I ordered but due to it being a product made with natural materials obviously the size varies. The one I got ended up being about 3-4cm bigger all over and thus wouldn't fit in my hamster cage. It is really tall so a hamster would need a ladder to reach the top. I had hoped to put it in the corner of my hamster tank as an extra level for them but it won't fit so I'll probably give it to a friend who has degus. THe overall quality if not bad. It's nailed and glued together and is quite sturdy. I would worry about the exposed nails for animals that chew a lot so keep an eye on it.