The Oslo 3 sleeper is a great space saver for your home. The bed frame is made to fit a double mattress on the bottom bunk and single mattress on the top bunk. This set up is suited to children's and guest bedrooms alike. Available in black, white or silver the Oslo 3 sleeper features a non-slip ladder, sprung slatted bases and is very easy to assemble. Mattresses are sold separately and the Oslo requires 1 x 3'0" (single) size mattress and 1 x 4'6" (double) size mattress.