These earring posts provide the perfect jumping off spot for your own design and creativity! The centerpiece is 12 mm in diameter and the piece measures 15 mm from the top to the bottom of the ring. The decorative part is 5 mm thick. Each post comes with a sterling silver nut-style back. The centerpiece is a piece of vintage pressed glass from Japan made before WW II. The flowers are crisp and the attention to detail is delightful. The pieces are set in a hand-made sterling silver bezel. These are my own design which I had made by silversmiths in Istanbul.