Nowadays earrings can be made of different materials, such as plastic, glass, metal and stones. The design of earrings is unlimited as well, including dangle earrings, stud earrings and hoop ones. Hoop earrings have a circular or semi-circular design and look like a ring. These earrings are constructed of special metal tubing with a thin wire, which are closed together by tension. Some hoop earrings are made in such a way that they can be rotated, because the end of the earring is inserted into the hollow of the metal tubing. Such kinds of earrings are the most comfortable ones if you don't like to take them off while sleeping. Besides, hoop earrings are a stylish accessory popular with teenagers and celebrities all over the world for many years. These earrings are acceptable for any style of clothing, from avant-garde to classic. Choose the ones for you and be in trend!