Symbol Caliper Metal Sign

About the Caliper design

Two long arms run out to a single pinched point on the left, so sharp it looks like an arrowhead or the nose of a paper plane. Between them a bulging arc bows toward the right, filling the jaws with the outline of whatever is being measured. Short crossbars sit near the top and bottom of the right edge, and the middle of that edge is left as a gap where the curve stops short.