This is a revision of one of our most popular clasps. The centerpiece is a vintage Japanese bead from the 1940s. It is pressed glass. It is set into a sterling silver box clasp. We put two rings on each of the long sides of the bead so that you could use it easily for a bracelet. The centerpiece is 28 mm by 22 mm. The clasp is 32 mm from ring to ring and does have a safety catch.