When we gave this cool, crisp fabric an upgrade with our super-soft organic cotton, we knew we had a modern classic on our hands, and on our beds. Twin and Twin XL sheet sets include 1 Standard Pillowcase. Full, Queen and King w/ Std. Cases sheet sets include 2 Standard Pillowcases. King and California King sheet sets include 2 King Pillowcases. Split King sheet sets include 2 King Pillowcases and 2 Fitted Sheets.