Square Throw Pillow Cover Design #2320136 Throw pillow cover only Insert sold separately Design printed on the front and back Hidden zipper for an elegant finish Available in a range of versatile fabrics Perfect for adding personality and pattern to elevate your space. All square throw pillow covers are designed by independent artists, from around the world, and printed and sewn in the USA. Pillow covers may be purchased with or without an insert. If you choose to purchase the pillow cover only, we recommend an insert one to two inches larger than your cover for the fullest look. Pillow Cover Dimensions: 18" by 18" (46 cm or 46 cm) 20" by 20" (51 cm x 51 cm) Fabric Linen Cotton Canvas Durability of linen with the softness of cotton Estimated shrinkage: 3-6% in length and 0-1% in width.