GRAFIX-Medium Weight Chipboard Sheets: Natural. Grafix chipboard sheets come to you completely bare so you can dress them up however you would like! Paint, ink, stamp, sand, distress the cover with paper fibers and fabric, stitch, die-cut, layer and even create a handmade album, the possibilities are endless. Each sheet is 1mm thick. Acid free. Package contains twenty-five 8-1/2x11in.