More room to play is what you get with the Atwater Living Bloor Small Space twin over full Bunk Bed. Built in sturdy metal that is solid, stable and durable, this bed is designed shorter than the average bunk bed to fit smaller spaces and is the perfect option for your younger children to maximize their space. This Atwater Living Bloor Bunk Bed comes with secured metal slats so no foundation is required. It also includes full-length guardrails and an integrated ladder to provide your child with utmost safety. The Junior Bunk Bed fits one standard twin size mattress and one standard full size mattress (sold separately) and the maximum mattress height for top bunk is 6.