The invention of the wheel changed the history of mankind. Western pioneers relied on the wagon wheel for their life and livelihood! These earrings may not change your life but you'll sure have fun wearing them while your friends try guessing what they're made of! These Wagon Wheels earrings are so lightweight you will hardly know you are wearing them! The outer circle is 3/4" in diameter and our unique ear wires are hand fashioned fromhypoallergenic Niobium.