What finger to wear ring?

It depends on what type of ring. A wedding or engagement ring should be worn on the left hand ring finger (the finger in between the pinky finger and the middle finger). A mother's ring should be worn on the right hand ring finger. Also, usually when people are widowed they change their wedding rings from their left hand ring finger to their right hand ring finger. The rest is just a matter of choice. Some people wear rings on all fingers and even the thumbs.