These unique Celtic knot earrings were created by me with both brass and alloy metals that have been professionally antiqued bronze plated. They are both nickel and lead free. These earrings are done in the Celtic theme with the knot charms and dramatic long dangles that end in a point. The earrings are 3 1/4 inches long including the brass ear wires. The backs of the earrings are hollow and shown in the listing photos. They are light and comfortable on the ears. Thank you!