I’ll be honest, these originally came with a connecting ring at the back, but we loved it as a simple stud and could not find it anywhere on the Internet without the ring so we popped the ring off and we LOVE it! 15 mm. Very light. One of our FAVS!
Goes with everything, especially great if you have lots of necklaces. Creates a nice balance without being too much.
Product care:
Don't wear in water. Remove nightly.