You can only put both of them on your left ear, you can’t put one on your right ear and one on your left ear. Other than that they are really nice quality and look very pretty.
I use this size and shape of gold filled chain as both a closure and extender for the bracelets and necklaces I sell in my Etsy shop. It has a lovely look and feel, and is easy to hook a nice, large lobster claw.