If it were me, I'd just spell "coin."
Sure,
the "F" handshape can be used to show small round objects (like a small pole,
buttons, or
COINS).
The "F" handshape can even show movements of your eyeballs. Yes
indeed, that "classifier F" handshape is flexible and can show
pretty much any small round hole.
Ahem, and therein lies the problem. The "F" handshape could be
held up and the "circle" could be used to represent a single coin --
but it could also be used to refer to someone's [cough] ...er...rectum
hole. So, you've been warned. Make sure you establish plenty
of context before you go waiving around your um, hole. (So as to not
be misunderstood.)
CL:F
Also see:
COINS
You can learn
American Sign Language (ASL) online at American Sign Language University ™
ASL resources by Lifeprint.com © Dr. William Vicars