18 inches Crafted in solid 10k yellow gold with genuine Opal and genuine emeralds. Gorgeous! Photos 7-8 show caliper and coin showing exact mm. Keep in mind photos are zoomed for fine detail. Face of pendant top to bottom bale included is 15.80mm Photos 5-6 show gold stamp. It’s stamped 9k BUT in gold standards today it’s testing as solid 10k gold using the niton gold analyzer . So it’s 100 percent 10k gold Perfect for every day wear Same day ship Gift box included for free( always!!) I have a ton of 10k, 14k, , Kay jewelers , zales , vintage , , white gold. Rose gold, yellow gold , gemstones , wedding rings Art Deco fine jewelry,engagement/wedding ring . Solid gold diamonds , opals,Ruby’s,emerald,gemstones listed currently here!! Absolutely gorgeous. Again photos are zoomed and will appear smaller in person Because I live in hawaii my time zone is different than most : keep that in mind . I ship within a day now