I've still got mine, '66. It barely fits on my smallest finger. My hands have grown a lot in 60 years. I have my college ring, too. It's bigger but I still can't get it on either ring finger.
My wedding ring is 22mm, size 12.5, and my right ring finger is bigger.
I also got one in '66... Have no idea what I ever did with it.. Haven't seen it in 40+ years, and frankly don't care..