I bought this bed in full size, but my full mattress is too big for it. I know there are two type sizes of full mattress' and I guess I have the larger size one. Also, the middle portions of the slats do not fit into the holes provided. The end parts of the slats fit fine. I placed my mattress on the bed slats and hope the slats do not come apart. So far so good. Pros: Bed is sturdy so far and comfortable. Cons: Slats and parts do not work as suppose to.