This is an illuminating nose piercing stud made from .925 Sterling Silver with a dolphin design and jewel available in your choice of clear, light blue, blue, green, purple, red, or pink . The design size is 3.5mm. This nose piercing body jewelry is designed to universally fit anyone. The size is available in 18 gauge or 20 gauge and 6mm-1/4 of an inch. The entire piece is nickel free.