Sea Turtle Two Sides Rectangle Zippered Pillowcase Pillow Cover 20x30 inches 50% cotton, 50% polyester Standard size that help extend the life of your pillows. The pillow case has an opening zippered on the side. Size: 20x30 inches(The Front side is the same to the back side) With pre-shrunk fabric, this pillowcase is washable at 60 degrees Celsius.