Kings Brand Metal Astoria Day Bed (Daybed) Frame With Trundle (Copper) Kings Brand Copper Finish Metal Astoria Day Bed (Daybed) Frame With Trundle. The day bed is one of our newest daybed introductions and features a design and finish scheme which offers style and sophistication. The day bed will work well in any room setting. Accepts twin size mattresses, Includes platform with 7 metal slats, (No need for a box spring or separate bed frame.). Dimension: Day Bed:78.5"x 41.375"x36"H, Trundle:73.125" x 39.5" x 4.25"H. Simple assembly required. The Mattress is not included it could be purchased separately.