【Layered Herringbone Necklace Material 】:Made of handpicked brass, and plated in 14k gold to ensure a long lasting finish that is tarnish-resistant,nickle free, lead free, and hypoallergenic, Reduces concerns about sensitive skin and product quality issues 【Gold Chain Necklace Size and Package】:Inner necklace Size:3mm/14"+2"extension, Outer necklace Size:1.5mm/16.5"+2"extension,this length works on practically