Dimensions Closure: Seamless Hinge Click Closure Dimensions: 8mm, 10mm or 12mm Inner Diameter, 18 Gauge (1.0mm) Material Titanium Base PVD Gold Plated Durable for Everyday Wear Safe for Sensitive Ears Jewelry Care Waterproof & Tarnish Resistant with proper care. After exposure to salt water, chlorine, or lotions/perfumes, rinse with cool to warm water and gently dry. Store in a cool, dry place when not in use. Avoid twisting or tugging to keep your jewelry looking its best