These cabochon earrings have either 12-13 mm round domes or 10 mm X 12-14 mm oval domes. In most every picture you will see two images of each earring. The left image shows the earring with antique brass plating and the right image shows the earring with antique nickel plating. If both types of plating are pictured, you must specify antique brass or antique nickel plating to complete your purchase. Each pair of large earrings comes with a pair of our medium earring backs.