These earrings are made of wood and transparent printed flex to resemble stained glass cathedral windows. The flex is transparent so light can shine through "lighting up the window like real cathedral windows. There are 4 colors of stained glass; Rainbow, Ocean, Autumn, and Jewel. These earrings are finished with nickel free antique bronze toned metal findings. The earrings come with a stud back. A clip on or ear wire can be switched out if needed Measurements: The overall length is 2.5" long and 1" wide. Materials: wood, flex, glue, nickel-free metal. Weight: The overall weight of the earring is 1.46 grams. A US Quarter weighs approximately 5.72 grams for comparison.