Promise rings should be given to someone that you want to make a serious commitment to without the confines of marriage. Look up promise rings love for a range of rings.Can school class rings work as a promise ring? Yes. Promise rings are a step below being engaged. You need to understand though that not all promise rings are rings of commitment to a loving, marrying relationship but of a true friendship. These rings can be given to show a promise about a particular situation. Be sure the person you are giving the ring to understand why they are getting one. Promise rings are usually worn on the left hand.