This essential 18K yellow gold filled flat snake chain necklace comes with a lobster clasp. It is 23.6 inches long and 5mm 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 yellow/white gold filled in stock for this model.