These are clip back earrings that are very comfortable, you hardly know they are there. Beautifully designed with intense blue and green natural stones. These are not the fake man made stones you see on today's market, the colors are gorgeous and genuine. They measure 1" x 7/8", they are stamped on the back "Sterling" with the GFMW hallmark. Even the clips are marked sterling. These are early pieces created by founders Jan Palombo and Michael Brothers who were early followers of a small movement of European jewelers practicing what is now known as green manufacturing.