None of the rings mentioned in the bible are wedding rings. The majority of rings found in the bible are generally referring to a king’s signet ring indicating a person of authority. There are two scriptures in the bible that could indirectly be applied to wedding rings.
“. . . that the women adorn themselves in modest apparel, with propriety and moderation, not with braided hair or gold or pearls or costly clothing.” 1 Tim. 2:9
“Do not let your adornment be merely outward – arranging the hair, wearing gold or putting on fine apparel rather let it be the hidden person of the heart, with the incorruptible beauty of a gentle and quiet spirit, which is very precious in the sight of God. 1 Pet. 3:3,4
Though these scriptures do not specifically mention wedding rings, in Christian history, and in days when women dressed more plainly, jewelry was considered to be inappropriate and this included the wearing of a ring. As time progressed, a more relaxed attitude entered Christian society and most churches today no longer frown upon or attempt to enforce rules pertaining to outer adornment. In fact, the exchange of wedding rings has become an accepted tradition in most churches, but not a requirement and certainly not scripturally suggested.
Because the ring is a circle and without end it has become a symbol of commitment. Wearing a wedding ring on the fourth finger of the left hand is a custom recognized by society as indicating a status of marriage and that individual has vowed fidelity to another person.