This is a gorgeous David Yurman wheat chain necklace. It is 8mm wide and 18” long. There are 14k yellow gold accents on the clasp. It is hallmarked D.Y. 925 585 near the clasp. It weighs a whopping 99.42g! Only extra large enhancers will fit on this chain. Yurman no longer makes these large chains so you can only purchase on the secondary market. PoshMark will authentic this necklace. I do have two enhancers available (blue topaz and black onyx) that can be worn on this chain.🙂