For the elegant minimalist, our Little Sphere Studs are now available in implant grade titanium for 24/7 waterproof, sweatproof, lifeproof wear. Also as as a titanium flat back for cartilage piercings and our signature Sphere Nap Earrings, 3mm. SIZE & FIT Earring top: 3mm diameter Post gauge: 20g (standard piercing) Sphere backings — a secure, adjustable alternative to our flat-back styles Best for first or second lobe MATERIALS & CARE Materials: Medical-grade (ASTM F-136) titanium. Hypoallergenic and safe for sensitive skin. Finish: Our jewelry is bonded with Titanium Nitride PVD to best match your 14k gold jewelry. Titanium nitride is a hypoallergenic material that is more durable and resistant to wear than traditional gold plating. PVD coating is also more environmentally friendly than traditional plating. Care: Earring backings feature a silicone core for a comfortable, secure fit. To keep them performing at their best, avoid prolonged exposure to cosmetics and direct heat. Remove and clean your earrings weekly to prevent buildup from body oils and everyday wear. Waterproof and tarnish resistant. To maintain shine, polish with a soft cloth. SHIPPING & RETURNS Free standard US shipping on orders over $150 Easy returns and exchanges