I think he means
Claddagh Rings
1) Traditionally, if the claddagh ring is on the right hand with the heart facing outward and away from the body, this indicates that the person wearing the ring is not in any serious relationship, and may in fact be single and looking for a relationship: "their heart is open."
2) When worn on the right hand but with the heart facing inward toward the body, this indicates the person wearing the ring is in a relationship, or that "someone has captured their heart".
3) A Claddagh ring worn on the left hand ring finger facing outward away from the body generally indicates that the wearer is engaged.
4) When the ring is on the left hand ring finger and facing inward toward the body, it generally means that the person wearing the ring is married."
here is a commercial site that specializes in them.http://www.claddaghring.com/?Click=11&gclid=CJDu45_To6ECFR49gwodQFYLww