Wonderful Underwater World Beautiful Mermaid Seashell Art Throw Pillow Case Zippered Pillow Cover Home Sofa Decorative 20"x 30" Inch (Twin Sides) This pillowcase is roomy in size (20"x 30") Material: 50% cotton, 50% polyester The Front side is the same to the back side. Pillow insert are not included. It's a zippered pillow case, with a zippered opening on the side. Hidden slide fastener design for good looking! With pre-shrunk fabric, this pillowcase is washable at 60 Celsius.