Home Decorative Pillowcase Vintage Colorado Flag State Throw Pillow Cover 16 x 16 Square Cotton Polyester Pillowcase Cushion Cover Size: 16 x 16 Inches. Made of durable and very soft polyester fabric. Hidden Zipper at one side, available for the pillow fillin. Image print only on front, the other side is white blank. Not include the insert, just one pillow cover. Machine washable.