[ Outer Dimension ] - 79.5 inch x 59.5 inch x 9 inch (Inner Dimension: 77.5 inch x 57.5 inch)[ Sturdy Frame ] - Enhanced high quality material provides safety and durable characteristics to the frame for support[ No squicking noise ] - Precise design and technology adapted to strong metal allows durability and safety to the frame with no squicking noise[ No box spring needed ] - Multi-purpose design for wide options allows the frame to be compatible with any type of mattress with or withour box spring[ Extra Storage ] - Enjoy spacious bed room with 8 inch additional storage beneath the frame for seasonal clothe, blanket[ Holds Mattress Firmly ] - Special frame slat design with anti-slip sticker prevents mattress from any movement[ Easy Assembly ] - Easy to self-assemble within minutes with included instruction manual, tools and parts