My Favorite Things Die-Namics Dies, 0.75 to 4.5-Inch, Postage Stamp This package contains Postage Stamp Stax: 6 dies ranging in size from 1x3/4 inch to 4-1/2x3-1/2 Inch These steel dies will cut through cardstock thin chipboard 1/4 inch cork felt acetate sticky back canvas fabric sandpaper 2mm craft foam and more They work with virtually any die-cutting machine that will accommodate wafer thin dies