Nymeria 19 Cassette Tape Diy Design Zippered Pillow Case Covers 20X30 (One Side) GA-671 Custom Picture Zippered Pillow Cases 20" X 30" (one side). Made of 50% cotton, 50% polyester. Having this soft custom pillowcase will add both comfort and style to your home. Custom your own photo or text, makeing a special gift for someone.