Fun and contemporary, this beautiful lightning bolt necklace is made of sterling silver in a minimalist style. The chain is 1 mm thick and the necklace is perfect for layering. Prior to purchase, it's recommend to take a ruler, pen, and paper and chart the size described for the lightning bolt. This will help you visualize the size more clearly. For example, 13 mm is close to 1/2-in and this size is smaller than a dime.