Is it normal to wear rings on your thumb?
Yep.Totally normal
Yes, wearing a ring on your thumb is totally normal. It’s usually just a style choice, and there’s no universal meaning attached to it.
Thumb rings have been around for ages, and people wear them because they like the look, want a ring that feels different, or find that other fingers are already spoken for. There’s no special rule about which finger gets to wear jewelry.
Some rings can carry personal or cultural meaning, but a thumb ring doesn’t automatically signal anything in particular. Wear it wherever it feels comfortable—just make sure it isn’t so tight that it’s hard to take off.