Tommy Bahama Outdoor Pillows Outdoor Cushions Indoor Throw Pillows 18 Inch Pillow Covers Polyester 100% polyester pillow covers. Use for indoor or outdoor pillows. Fits 18 inch pillow insert. Also available with removable pillow insert. Fabric repeat is 13.5" V 13.5" H. Constructed with zipper. Use for decorative throw pillows on sofa or couch. Polyester 18 x 18 square pillow cover. Fabric by the yard also available. Custom made in USA. Made with a Tommy Bahama indoor outdoor fabric.