MATERIALS: The Earrings Studs Are Made of Stainless Steel, Surgical, Hypoallergenic, Nickel & Lead Free. Extremely Durable, Will Not Rust or Tarnish. It Looks Like Expensive Jewelry, Has a Nice Weight To It, Not Hollow, Nicely Polished and Has a Beautiful Shine. PRODUCT SIZE : Pin Diameter : 18G = 1mm/0.039 (approx.); Barbell Length = 6mm/0.23 , Width = 8mm/0.31 . COLORS : Black, Gold, Silver, Blue, Rainbow Color, 1 Pair for Each Color. And You Can Choose The Color According To Your Interest Every Day or Use It on Your Ear Together.FEATURE: Gorgeous Special Design, Perfect for Both Men and Women, These Earrings are Perfect for Any Outfit, Crafted with Stainless Steel, These Hoops are The Perfect Gift for Any Occasion & Holiday.These beautiful earrings are unique and elegant, suitable for you to wear at any party, it can be matched with any of your clothing + it makes a great gift