Woman and men usually wear their wedding rings on their 3rd finger on their left hand which is closest to their heart.
Also once you become married the tradition dictates that the engagement ring be moved back to the third finger on the left hand.
And you usually wear the wedding ring on the same finger on the left hand which is the third finger but wear the wedding ring in front of the engagement ring.
However you can wear your wedding ring on any finger you prefer to wear it as there's no law that says you have to wear the wedding ring on a certain finger.
But most people wear the wedding ring on their left hand and third finger due to tradition.