The wedding ring is worn on the fourth digit, called the "ring finger," between the middle finger and the little finger. While in many countries it is common to wear the ring on the right hand, it is more traditional in many others to wear it on the left. This is the case in the United States and the United Kingdom.
In Greek antiquity, it was believed that a vein circulated blood directly from the heart to the ring finger of the left hand; however, the Romans believed "left," which has negative connotations in Latin, to be unfavorable. Their preference for wearing the ring on the right hand persists today in countries with a strong Catholic Orthodox cultural background.