A Plain Ring
Although Jewish law doesn't require a couple to exchange rings (any object of value given from the groom to the bride will do), rings are both a historical and contemporary symbol of Jewish unions. Regardless if the pair is rich or poor, the ring should be simple. The groom is supposed to place a plain gold band without stones or ornamentation on his bride's finger. This symbolizes the idea that the marriage, like the ring, should be uncomplicated and beautiful. The moment the ring is placed on the bride's finger, the two are wed [source: Shulman].
It's not mandatory that the groom also receive a ring, but if he does, the bride must wait until after they have left the chuppah before she gives it to him. This is done to ensure that the marriage ceremony follows the guidelines set forth in the Torah [source: Shulman].