This steel box-spring frame is set on casters and comes with a choice of attachments designed to fit easily with either our headboard-only or headboard/footboard options. Twin: 38" wide x 71" long Full: 54" wide x 71" long Queen: 60" wide x 73" long Sturdily constructed with a 12-gauge high-carbon steel frame and center support. Fitted with casters for easy mobility. Headboard-only attachment is compatible with our Lewis, Samantha Scallop and Corner Star headboards, as well as our Catalina Fixed Gate 3-In-1, Kendall Fixed Gate 3-In-1 and Madison Fixed Gate 3-In-1 cribs. Headboard/footboard attachment is compatible with our Larkin Fixed Gate 4-In-1 Crib. View and compare our mattresses with our Mattress Comparison Guide.