Solid poplar bed slats designed to support all mattress types, including memory foam. And latex mattresses (standard coil mattresses should be used without a box spring), .Central support with adjustable leveling foot. Queen :: 64"w x 85"l x 36h. King :: 85"w x 85"l x 36h. Cali king :: 77"w x 89"l x 36h. Please note :: king size bed with 10 mattress pictured (a queen size mattress was used for these photos, your king size mattress will fit snugly in the frame- see customer review photos). Custom modifications are available, please send us a message to discuss your requests. This item is made of walnut and solid hardwood, maple. The style is modern and mid century.