Acehg Cotton Linen Square Skull Throw Pillow Case Decorative Cushion Cover Pillowcase for Sofa Feathers 18"x18" (#3) Cotton & Linen Made of lightweight and durable linen cloth material. Size: 18 x 18 inches / 45 cm x 45 cm. Adds the vividness to the room. The pattern is only on the front side. This cushion cover has an invisible zipper.