King's Brand Pewter Finish Metal Twin Size Day Bed (Daybed) Frame With Trundle King's Brand Pewter Finish Metal Twin Size 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. Simple assembly required. Accepts twin size mattresses, Includes platform with 7 metal slats, (No need for a box spring or separate bed frame.). Weight capacity 500lbs. Dimensions: Day Bed: 78.25"W x 41.25"D x 39.75"H. Trundle: 73.125" x 39.5" x 4.25"H Mattress is not included it could be purchased separately.