ANTI-TARNISH GOLD COATED Base metal: brass - coated in 18k gold. Our gold layers are wonderfully thick. Durable for long term wear. SAFE FOR SENSITIVE SKIN Our heavy-duty plating is free of nickel, lead, & metals that irritate the skin. Customers with very sensitive skin have been pleased with our jewelry! Will not turn skin green. SIZE Huggie hoop diameter: ~.4" (11mm) Shell size: ~.5" x .55" Total length of earring: ~1"