Gauge (Size): 18G (1.0mm); Inner Diameter: 15/32" (12mm),High polish smooth surface, comfortable to wear. Please check the size carefully. Hypoallergenic Nose Rings Hoop/Hypoallergenic Earrings Hoop: 316L Surgical Steel Smooth surface,comfortable to wear without sharp edge. Match with suitable apparel for different occasion. Smooth surface and easy to use.Perfect for Nose,Cartilage,Septum,Tragus,Helix,Rook,Lips,Belly Ring and Nipple Piercing. Very easy to open and close by hand.Not require a tool,Available Colors:Silver,Gold,Black and Rose Gold,Available 20g 18g 16g,14g,12g,10g and 8g. We can offer inner diameter 5mm,6mm,7mm,8mm, 9mm,10mm 11mm,12mm,13mm,14mm,16mm Perfect for women, men at any age, Perfect for daily using show your personality. Followmoon Body Jewelry is the premier brand for all of your body piercing needs. We only use hypoallergenic materials in all of our piercing rings and hoops, We can supply a wide range of body piercing jewelry.