30 x 40mm plus the loops. This three strand beauty has lots of style. The Lucite cabochon set in this silver filled clasp was made to mimic a gemstone. Notice the flicks of white and gold glitter within the cabochon. The Gemasite cabochon collection is made in the USA, circa 1960. We unearthed these beauties from the famous "bead hoard" and then had them made into box clasps.