A ring is a band worn as type of ornamental jewllery around a finger; it is the most common current meaning of the word ring. Other types of metal bands worn as ornaments are also called 'rings,' such as arm rings and neck rings.

Rings are worn by both men and women and can be of any quality. Rings can be made of metal, plastic, wood, bone, glass, gemstone and other materials. They may be set with a "stone" of some sort, which is often a precious or semi-precious gemstone such as ruby, sapphire or emerald, but can also be of almost any material.

There are various methods for determining proper ring size. Some of the largest rings in the world are made for the winning team of the Super Bowl. The unofficial record for the largest championship ring ever presented to a professional sports team belongs to the 2003 World Series champions Florida Marlins, with a weight of over 110 grams and with over 240 stones.

Rings can be worn on any finger, even on toe fingers. In Western culture, the traditional "ring finger" for the wearing of an engagement or wedding ring is the fourth finger of the left hand (with the thumb counting as finger number one). The signet ring, a ring designating nobility, is commonly worn on the little (fifth) finger of the right or left hand, depending on nationality.