Charlie Brown Zippered Pillow Cases 20x30 (Twin sides) ----Custom personalized Pillowcase With Your Photos 50% cotton, 50% polyester. This custom standard pillowcase size (20'' x 30'') With pre-shrunk fabric, this pillowcase is washable at 60. It's a zippered pillow case, with a zippered opening on the side. Having this soft custom pillowcase will add both comfort and style to your home.