This is our popular donut shape pendant with a top hole which measures approximately 15mm. The exterior diameter is 36mm, about 1 1/2 inch. Topaz sprinkles over 24kt gold foil are layered between a bottom layer of topaz and the top layer of clear Murano Glass. The back of this pendant has the Murano Glass guarantee in gold lettering. Its easy to make a colorful necklace, just add your favorite cord.