Mybecca Hypoallergenic Insert Polyester Pillow Form, 20" W X 20" L Down-like comfort - Odorless , Stuff your decorative throw pillow cover or Euro pillow sham case and add a little flair to your bed Resilient / Refluffable , Pack more cushion to your sofa couch or bed for lumbar support or just decoration Measurements are seam to seam -Pillow inserts should measure 2 to 3 inches larger (length and height) than pillow cover. After filling, pillow will decrease about 10% - 15% in size. Order one size up! Insert filling material: 100% Hypoallergenic Polyester use in home or in a outdoor cover - MADE IN USA Note To Customers: For best results this insert is recommended for 18" x 18" or 19" x 19" sham covers, If your cover is 20" x 20" we recommend 22" x 22" inserts to provide a plump and full pillow from corner to corner.