This bone folder is made out of Teflon, a non-stick material which offers a number of benefits over bone and plastic folders. It will not leave a burnishing or shine mark on your paper where you crease your card. Plastic folders tend to stain, wear down and can leave marks on your paper. The large Teflon Bone Folder measures: 0.75 inch wide, 0.25 inch thick, 6.25 inches long.