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 4mm tall. The entire set comes in a 3x3x1-1/4 inch plastic storage case. This package contains twenty-seven metal stamps including the lowercase letters a-z and the question mark symbol. Design: Jeanie Lowercase. Imported.