CHAIN IS NOT INCLUDED Available in Solid 14K Yellow or White Gold, or Sterling Silver Size Reference: 17mm is the size of a US dime 19mm is the size of a US nickel 25mm is the size of a US quarter Saint Helena (Latin: Flavia Iulia Helena Augusta) also known as Saint Helen, Helena Augusta or Helena of Constantinople (ca. 246/50 18 August 330) was the consort of Emperor Constantius, and the mother of Emperor Constantine I. She is traditionally credited with finding the relics of the True Cross.