70mm clear octagon with pointed back . 2-3/4 inches across over 1-1/2 inch thick with a point in the center of the back. The front side of the prism is a large octagon shape with a smaller octagon shape cut in the center and facets around the smoother octagon center. On the back is pointed like a diamond with facets spanning out from the point. Large and heavy enough to be a paperweight. Your prism will come gift boxed with a bow as pictured.