The Dual King Adjustable Bed is usually recommended for two people, because the reason people LOVE our Beds, is that each one can adjust to every position at any time you wish. If you have a One Piece Beds, two people cannot individually adjust. The Dual King 76" x 80" is the standard size King-size Beds as the Eastern King. (It is 6" wider, and 4" less long than a one-piece CA King). Most people purchase the standard 76" x 80".