foamily set of 4-12" l x 12" premium outdoor water resistant hypoallergenic stuffer pillow throw inserts sham square form, standard/white foamily whether you are using it solely as an accent piece to create interest in your room, or as a functional head pillow, this fashionable bedding accessory offers great looks and endless comfort. this poly-filled pillow provides firm support for your neck as you lie in bed - or back support for when you're in a seated position. note to customers: for best results this insert is recommended for 17x17 sham covers, if your cover is 18x18 we recommend 20x20 inserts to provide a plump and full pillow from corner to corner. made in the usa