This is a superb German Art Deco necklace. It is adjustable in length. The chain is chrome and the pendant is silver and onyx. My mother had the clasp replaced decades ago but retained the original links with the onyx detail at the end. The necklace can be worn as a choker also depending on where you chose to close the clasp. The pendant measures 2.5 inches by 2.5 inches. It is a great size and makes an amazing statement. At full extended length the necklace is just under 10 inches from top to the bottom of the pendant. And at the shortest measurement 7.5 inches. This necklace is a conversation piece. I can only tell you every time my mother or my wife wore this necklace it got an amazing amount of attention. This was made in Germany at the very height of the Art Deco movement. And pieces like this have become extremely difficult to come by. It is being offered from our collection for the very first time. I hope the next owner will be as thrilled as we were.