Kings Brand Furniture White Metal Twin Size Platform Bed Frame, Mattress Foundation/No Box Spring Needed Kings Brand White Metal Twin Size Platform Bed Frame, Mattress Foundation / No Box Spring Needed . Beautiful and elegant, the Kings Brand Platform Bed adds an aura of sophistication to any bedroom. This bed is constructed from the sturdy metal, which can last for many years. Includes platform with 7 metal slats, (No need for a box spring or separate) Dimensions: 77" L x 41" W x 17" H.