Online websites such as ebay.com and Amazon.com
Simply 'Thumb Holes'.
next maybe
You are a disgusting human being
Sometimes you by them on the computer. i will give you a link. .seeitbuyitloveit.com/restraints/r663.html
cuffs
you can buy one at walmart, target, or radio shack.
Walgreens or cvs. my bro is 14, he sucks his thumb.
Go to FashionTIY!
cuffs is the best answer that I could think of
These cuff links will look great on your shirt cuffs!
Finger-Cuffs
The singular form is cuff.