What are those circle ring piercings you get in your earlobe what is the piercing called?

They are called stretched ears, not gauges as that term makes no sense and piercers will laugh at you if you call them that lol. You use a stretching taper to widen an existing ear piercing and wear a tunnel or plug in your ear, or you can get the hole cut into your ear at the desired size. This is called scalpeling.