Pull two pins and the lower sofa seat will lay down to form the main, full size mattress bed; the single size mattress bunk above is fixed. You can disassemble this space-saving piece of furniture quite easily -- the two ends stay intact, then the top portion and lower bed assembly simply lift off to form four separate pieces to move. Ample sleeping space for two to three -- it's a perfect inexpensive space saver for college students. Finished size: 60" H, x 78" W, x 48" D. Full size and single size mattresses. Take a look at a customer's photo of this project!