These Earrings are a creation from my new Stainless Steel Line. Since all of the findings and parts are high quality Stainless Steel, you don't have to worry about allergies or tarnish anymore. This is a flower shaped post Earring, it is 12.5mm ( around 0.5"). It comes with a pair of Stainless Steel backings, and a pair of plastic backings. You can find all sorts of different "Earring+" items in my store to add on to your post Earrings.