This pentacle is about 5/8" (15mm) high. I'm only offering unpolished materials, since the polish would just get stuck in the crevasses. Tip: For the metallic rings, put a coat of clear nail polish on the inside to keep the tarnish from getting on your skin. Let the outside of the ring tarnish naturally to highlight the pentagram. Note: Shapeways may not print the steel versions at this size, due to potential difficulties with the points of the pentagram.