History of Horror Pattern Printed Custom Zippered Pillowcase Cover Pillow Cases Standard Size 20x30 (Twin sides) Soft and comfortable materials in 50% cotton and 50% polyester. Pre-shrunk fabric could be washable at 60 celcius. 20 by 30 inches, elegant home decoration Easy installation and removal, convenvient cleaning. Customized pillowcase expresses your personality and brings much enjoyment.