BUTTON-[version]:
Use an "F" handshape to show buttons on your shirt.
button:
In this sign I'm touching an "F" hand to my torso then arching it
down a few inches and touching again. You can show either two or three
buttons, but it wouldn't be necessary to show more than that for this sign
unless you were making a point that the person had a "whole bunch of
buttons on their shirt."
Sign: button
Notes: