This sterling silver pendant is based on the caffeine molecule. The pendant is about 1.5 inches wide and attached to a sterling silver snake chain that can be adjusted for length between 16 to 18 inches. It closes with a lobster clasp. Each necklace is packaged in a recycled gift box and includes an informational tag about caffeine. The necklace can be purchased here for $85. There are also several others molecule necklaces sold here on Makers Market.