Finger [1] : A traditional unit of distance equal to 2?nails?or 4.5?inches?(11.43 centimeters). This unit represents the length of the middle finger, from the tip to the joint where the finger is attached to the hand
Russ Rowlett (Director), How Many? A Dictionary of Units of Measurement, Center for Mathematics and Science Education University of North Carolina, USA 2005. http://www.unc.edu/~rowlett/units/dictA.html, (Unit of Meas and Covr Factors - Amer) {608}