Reposhing because I loved this necklace so much that I bid on two of them and accidentally won them both! 🤦🏼‍♀️ I have quite a few David Yurman pieces and this is definitely authentic. It is a 16 inch necklace, however if you like it a little longer with some outfits you can use a silver necklace extender to make it a couple inches longer. I will include the extender as well! This necklace is in excellent condition. Reach out with any questions!