Contour Products, Flip Pillow Cover, King Size (30 inch Width) This case is designed specifically for the 10-in-1 Flip Pillow by Contour Products Cover allows for the Flip Pillow to have flexibility needed to work in all 10 positions Standard size is 20 inches wide, Queen is 25 inches wide and King is 30 inches wide, we recommend you measure the width of your flip pillow before ordering 300 thread count and 100% cotton Machine washable, line dry or tumble dry on low for best results