This necklace includes two medals back to back - Sainte Magdeleine and the Camargue Cross. They are both 18K gold vermeil connected with the same 18K Gold Vermeil bail and hang on an 18 inch Italian 18K gold vermeil chain.

The Camargue Cross measures 14x26mm and the St Mary Magdalene medal measures 20x28.5mm.
For measurement comparison:
A quarter coin measures 24.26mm in diameter
A nickel coin measures 21.21mm in diameter
A dime coin measures 17.91mm in diameter

In 47AD Mary Magdalene's boat traveled from Palestine to a tiny village on the Mediterranean in Gaul called Saintes-Maries-de-la-Mer. The Camargue Cross originated in the same village of Saintes-Maries-de-la-Mer.