What’s included in a sheet set? February 18, 2021 18:19 Updated 1 x fitted Sheet 1 x flat Sheet 2 x pillowcases (Twin / Twin XL / Full / Queen sheets include standard size pillowcase; King / CA King include king size pillowcase)*Twin/Twin XL sheet sets include one pillowcase Related articles What is a sateen weave? What materials are the sheets made from? What are the dimensions of the sheets? How does the 100 Night Sleep Trial work? Does the Birch Mattress require a foundation?