we bought the full size and it looks so awesome in my 3 year old’s new “big boy room”. he’s in love with it. it is kind of daunting when you take all the pieces out of the box, but it ended up being really simple to put together. we bought the full 10” innerspring wayfair mattress and, albeit hard as a rock, it’s a perfect fit and perfect comfort level for a little kid. it doesn’t require a box spring or bunkie board, which is great.