Mount St. Helens key chain features an image of Mount St. Helens erupting with blue enamel for the sky. On the back are the words "Mount St Helens erupted violently on May 18, 1980 with the force of an atomic bomb reducing the height of the mountain from 9,677ft. To 8,377 ft." Key chain is 1-1/4" x 1-3/4".