Three Swarovski crystals graduate from 4mm to 6mm to 10mm. In the Cosmic Jet (10 mm) and you can see a rainbow of colors when held up to the sunlight. I love these earrings and often wear them anytime I have black in what I am wearing for the day . For everyday and dressy occasions. 3 1/4″ long including the ear wire. Sele3ct Sterling Silver or Gold filled.