This piece is a great size. It the size of a typical bench and when its delivered there is nothing to put together so there will be a big box delivered to your door. I have yet to get the dog to use the inside but thats only because the puppy keeps chasing her and the older dog jumps on top of the bench for salvation. The top hatch does lift open but only part way so if a child gets stuck in there they are able to get out.