Sayyed Mohammad Al-Musawi,
Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to religious questions. In the past, he has also spent significant time in India guiding the community.
It is recommended to wear ring or rings on the right hand or both hands but not to leave the right hand with out ring. Obviously, ring for man must not be from gold because wearing gold is forbidden for men.
It is Makrouh (disliked) to wear any ring in any of these three figures: palm, index and middle. We have narrations that wearing rings in any of these three fingered was practiced by enemies of the Prophets e.g. people of Nooh and Lut.