sheet set Sheet sets are a convenient way to purchase sheets because they include a flat sheet, fitted sheet and a pair of pillowcases all in one package. (Twin sheet sets come with one pillowcase.) Sheet sets are often a very good value. Linenplace offers a great selection of sheet sets in a variety of styles and price ranges. And to help you find the sheet set that is right for you, we offer our exclusive "Expert Ratings" and "Buyer's Hand Notes".