Queen.
Set includes fitted sheet, flat sheet, and two pillowcases. Each piece in the set boasts superior construction, from a fitted sheet with elastic adjusting corners and a one-inch elastic cuff for a clean, crisp fit around your mattress (fits 18 H mattress), to a top sheet with 4 of additional width for more complete coverage throughout the night, to a pillowcase designed to envelope your pillow for a secure fit.