This essential 18K white gold filled herringbone chain necklace comes with a lobster clasp. It is 16 inches long and 4mm wide. This chain is hypoallergenic, nickel-Free and cadmium-Free. 100% Satisfaction Guarantee! Quick Shipping from California. *** Free Velvet Gift Pouch Included. We have 16 inch ~ 38 inch; 18K White Gold/Yellow Gold Filled in stock for this model.