Estrogen, famous for its role in female development, also influences bone density, body temperature, cholesteral, and even skin and hair health. Plus, with its four rings--the sterol group--it's simply a beautiful molecule. This sterling silver pendant is 1.5" wide and attached to a sterling silver snake chain that can be adjusted between 16 and 18 inches and closes with a lobster clasp.It's packaged in a recycled gift box and includes an information tag about estrogen.