Charter Club Essentials Basics 300 TC Full Sheet Set, Red Fiber Content: 60% pima cotton, 40% polyester. Flat sheet fits mattress: 78in x 80in. Finished size: 108in x 102in. Fitted sheet fits mattress: 78in x 80in x 14in. Fits up to 16 inch deep mattress. Pillowcases fit pillows: 20in x 36in. Finished size: 20in x 40in.