This is my mother's collection. She loved Givenchy, so although there are no markings, it might be Givenchy. It's unused, but one stone came off and was repaired. It's near the clasp, so it's not visible from the front (see photos 11 and 12). Length: approximately 42 cm It fits snugly around the neck and is very gorgeous and cute. It seems like it would be perfect for the Christmas season.