Bed frame: Get a metal bed frame with optional memory mattress. Metal: Made with a high-quality, durable metal base instead of wooden slats, providing excellent support. Four sizes: Choose between single, small double, double or king (see below for dimensions). Three colours: Comes in black, silver or white designs. Storage space: Keep your bedding or other items under the bed and save floor space! Modern: A great addition to a contemporary design scheme.