Regency Collection King Size Sheet Set 100% Cotton Sateen White 6 Piece The Regency King Sheet Set is a white bedding product that includes a flat sheet, a fitted sheet with fully elastic edges, and four pillowcases. Size: Fits mattresses up to 17 inches deep. Dimensions: The flat sheet measures 108 inches by 102 inches, and the fitted sheet measures 78 inches by 80 inches. Care: Machine washable on a gentle cycle in cold water and tumble dry low.