This flat herringbone chain is reversible, gold-plated on one side and silver-plated on the other. One necklace but with two colors to choose from! The hottest style of necklace. Approximately 0.25 inch(4 mm) wide which is the most popular size. Length: 16 inch with 3 inch extender. Can be styled from choker to necklace and great piece to be layered with different necklaces.