ComfyDown 95% Feather 5% Down, 18 Inch Diameter Round Decorative Pillow Insert, Sham Stuffer - MADE IN USA MATERIAL: Expertly filled with 95% feather, 5% down, covered with a top quality, 233 thread count fabric. made of 100% Cotton, with downproof stitching, to prevent feathers from poking out. USAGE AND CARE: For indoor use, with all types of shams & covers, before first use, and as needed, fluff up your pillow a few times, to get it a full plump look, this will help it last for years! MADE IN THE USA: Every product in the ComfyDown catalog, is proudly made right here in the United States. Thank you for supporting American manufacturing! You will love the difference! HOW TO MEASURE:Pull tight along the outer seams of your sham, then measure the middle of your sham, from seam to seam - height and width - to find the correct insert needed. RECOMMENDATION:For best results, your pillow insert should be larger than your sham to correctly fill the corners of the pillow cover, this will provide a very attractive firm and fluffy look to your sham, we recommend to place our inserts in shams that are 1" or 2" smaller than the pillow, It would depend on the thickness of the sham, a thick fabric would need a 2" larger insert to keep it fluffed, a more lighter fabric would need a 1" lager insert.