Pillow Cover Aspens, Colorado - Throw Case (18" x 18") Made of durable and soft Satin Fabric. The cover is Smooth. Size: 18 x 18 Inches(1 inch error range is allowed), print on one side, the other side is white blank. It's a zippered pillow case, with a zippered opening on the side. Please Note: Just one pillow cover, not include insert. There are slight difference between the picture and the real item caused by light brightness.