The beautiful low-dome mabé pearl in this necklace is one inch in diameter. The round pearl is set in 18K gold and hangs on the Hook Bead Chain. When the Pearl Amphora charm is worn on our Hook Bead Chain at the standard 15" length the pendant adds almost an inch, bringing the necklace length to 16 inches.. You have the option to choose a 16" length chain also. If you are adding to your charm collection you can buy the charm alone.