These earrings are wonderful.  Something in my skin turns cheap earrings green and black so I have always bought the most expensive studs that Claires sells.  I have six piercings and frequently lose earrings so I thought I'd give these a try.  They were so awesome, I bought two more pairs.  The seller was very, very accomadating of my requests.  I love these earrings and they are all I wear now!  UPDATE:  I ordered two more pairs of these earrings and they came with a different kind of back.  The newer back fell off the earring and the earrings were lost right away.  I have quit ordering these!