Septum Ring Size: Hoop Thickness=Hoop Gauge: 0.8mm=20g, 1m=18g, 1.2mm=16g, Inner Diameter: 6mm(1/4''), 7mm(9/32''), 8mm ( 5/16'' ), 9mm(23/64''), 10mm(3/8''), 12mm(15/31''), 14mm(35/64'') for Choose. Choose the Proper Size According to Your Piercing Hole. Check Our Size Pictures and Product Description for More Detail About How to Choose the Right Size. Surgical Steel Earrings: These hinged clicker segment seamless nose rings are made of surgical steel that has been ground and highly polished, lead and nickelfree, sturdy and waterproof, even for bathing or swimming, you don't have to take it off. Each nose rings hoop is carefully selected by us before it is packed and shipped. Septum Jewelrys: Can Be Used As Septum Ring Jewelry, Cartilage Earring Hoop, Tragus Earrings, Helix Earring, Daith Earrings, Conch Piercing Jewelry, Rook Piercing Jewelry, Lips/Labret Piercings. 5 Colors Per Set: Each Set Has Five Colors, Wear Different Color of Earrings Matching Your Clothes or According to the Status of Your Mind. Hinged Clicker Sleek Seamless Hoops, Basic Circle Style Nose Rings Septum Jewelry, Match Earrings And Ear Studs Are Beautiful, Women Men Unisex. This is a Special and Lovely Christmas or New Year Gift for Family, Friends and Colleagues,etc.