Solid 14K gold. Butterfly backing. 20 gauge earring studs. Available in Rose Gold, Yellow Gold, and Rhodium plated White Gold. 7x5.5mm. Sold in pairs only. High polish finish. Rhodium-plating is not ideal for people with nickel allergies. Opt for Yellow or Rose Gold if this is you! As all Gold pieces in the LUARGOLD line are hand made, please allow 1-2 weeks for completion.