Tini Lux mini square polished finish hoops crafted from biocompatible titaniu. These hoops are safe for sensitive ears, water resistant, and non-tarnishing. Mini huggie hoops. Color is silver. Base metal: Pure Titanium ASTM F-67 Coating: PVD Titanium Nitride Outer Diameter: 14mm Hoop Thickness: 3mm Post Length: 6mm Post diameter: .8m I have an allergy to metal alloys like nickel and these earrings do not cause a reaction to my ears. Smoke free home.