Stud earrings are a kind of earrings made up of a small component that fits onto the earlobe and does not dangle down from the earlobe. While the size of stud earrings can vary quite a bit, earrings that extend beyond the perimeters of the earlobes are not generally thought of as stud earrings. One of the identifying features of stud earrings is the way in which they are fitted onto the ear. In almost all cases, these kinds of earrings are affixed to the ear with a post rather than a hook. The material used to make these kinds of earrings and the shape of these materials can vary quite a bit.