IMPRESS ART-Metal Stamps. Leave a lasting impression on your artwork! These metal stamps are designed with the jewelry maker in mind. They are precision-cut from hardened steel and will last project after project. Simply use a hammer to impress the design into a metal blank. Each stamp has a 2-1/2 inch long shaft that is clearly labeled on one edge. The actual stamped impressions are 3mm tall. The entire set comes in a 1-1/8x1-1/8x2-3/4 inch plastic storage case. This package contains nine metal stamps including the numbers 0-8. Design: Bridgette Numbers. Imported.