New 18K Gold Stamp. This is a new 18K gold stamp. It is made of heat treated tool steel. The shank measures approximately 5/16" (8 mm). It measures approximately 3 15/16" x 1 1/8" (100 x 28 mm). We work hard to update our descriptions and pictures of our merchandise. As part of a process of ongoing innovation by our suppliers, newer versions of the item shown may be shipped before we are able to complete an update. As a result there may be a slight variation in color and design.