A promise ring is a ring that is inicative of a serious promise made to oneself or another. It may be given to a romantic partner to signify a commitment to a monogamous relationship, without a more lasting bond such as marriage. Lovers mostly exchange promise rings to indicate their commitment to the relationship they have. Generally, a girl receives a promise ring from her lover when they know they want to be married, but because of age or circumstance it is not possible at that time. Students sometimes use class rings as a promise ring, although this may be less common than in the past. A friend may bestow a promise ring to another friend to signify their loyalty and/or resolve to remain friends forever. A promise ring may also just be purchased for oneself as a reminder of a personal promise.