CafePress Solar System Planets Standard Size Pillow Case, 20"x30" Pillow Cover, Unique Pillow Slip This standard size pillow case measures 20"x30" to fit over most pillows (not included), and is made of 100% soft woven polyester. Our pillow covers are professionally printed on the front, so your unique design will look great and make someone smile with the decorative artwork. The back is unprinted and is a luxurious white color. Treat yourself, or make this pillowcase the perfect housewarming or wedding gift, or give it for Mother's Day, Father's Day, Valentine's Day, Christmas, birthdays, anniversaries, or for no reason at all! This pillow slip is open on one end for easy access to your pillow (zippered closure in the EU). We offer 100% money back guarantee, so you can buy with confidence. Your satisfaction is our promise, and returns/exchanges are made easy.