A trio of spheres representing past, present, and future. Also available as solid 14k studs. SIZE & FIT Earring top: 2.2mm diameter Post gauge: 20g (standard piercing) Post length: 6mm (standard piercing) Best for first or second lobe How to Insert Your Nap Earrings MATERIALS & CARE Materials: Medical-grade (ASTM F-136) titanium with cubic zirconia crystals. Hypoallergenic and safe for sensitive skin. Finish: Our jewelry is bonded with Titanium Nitride PVD to best match your 14k gold and fine silver 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: 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