Description: The StyleMaster bed is available as a platform bed in queen, king and California king. This view shows the bed frame with the optional "adaptor kit" installed, making it possible to use a mattress without a "box spring". Your mattress can go directly on top of the 16 slats; it is recommended that you use a modern 12" to 18" inner spring mattress. The siderails are adjustable for height (see metal clips at ends of siderails) so that your mattress can be positioned to fit flush with the top of the footboard in most cases. For measurements of the beds, see the FAQ section on beds.