I really, really, really tried how to remember this cool parlor trick from my days of Klutz books for Christmas presents... I could not.
But, luckily, this cat from WikiHow knows the whole process to turn an ordinary dollar bill into a bit of bling.
Place the bill on the table, face up.
A former president (or Ben Franklin or Alexandar Hamilton) should be looking back at you.
Fold the top end down so that the fold falls just under the
white edge. This covers the white edge and makes the finished ring a
bit slimmer. Note that the front margins are different from the back
Read the rest of the article here: The Dollar Bill Finger Ring.