This bold, thick solid sterling cast earrings have ear posts instead of ear wires or loops to allow the mobile part to be the fossil small shells that were set in a way that look like claws that grab the "stones" instead of the more usual way with stones watching the front. (It is something almost medieval, brutal in the setting this way, less "civilized", less "usual"...)
No light weight, the sterling ear nuts will travel to you with extra silicone nuts as support -I found them so comfortable that decided to add them to all the earrings with earwire or ear posts in this release- that can be worn instead or with the sterling nuts on the back.
For measurements, the pictures where the earrings rest on the bust show their real size since it is a human size mannequin, some of the other pictures include a USA quarter coin and a ruler to allow you to have as much idea of their real size as I possibly can provide. 
If you need some metric measurement just let me know.