Which Finger Wears a Promise Ring

right with it on the same finger with the promise ring (it's placed there during the ceremony). That's how women end up with 2 rings and then men only have one.

So which finger should it be worn on ? Well, here are some recommendations for choosing the finger to wear your promise ring.
Promise Rings should ideally be worn on the ring finger of the left hand. This promise ring is then replaced with the wedding ring at the time of marriage. There are some people who believe that the wearing of a promise ring on the left hand ring finger could be confusing as, people could mistake it for a wedding ring! You will therefore find quite a few people wearing their Promise Ring on the ring finger of the right hand.
A Purity Promise Ring is worn as a symbol of commitment made for sexual abstinence or abstinence from other habits like drinking or smoking. When wearing of a promise ring means sexual abstinence, the ring should ideally be worn on the left hand ring finger as it would then be replaced by a wedding band after marriage. If a purity promise ring is worn to commit abstinence from other habits or substances, it can be worn on any finger but the left hand ring finger is preferred.
Friendship Promise Rings are given or exchanged between platonic friends (very close friends with no romantic relationships). To hold the right meaning of such promise rings, they can be worn on any finger including the thumb. However, it is best to exclude the left ring finger to avoid any misinterpretation or misunderstanding of romantic intentions.

But at last, it depends on you. Its personal preference really, so whatever feels most comfortable to you. You can wear it on whatever hand and whatever finger you want to, its your choice and as long as you wear it he or she won't care what finger its on either.