The system of using the tsun/cun is a genius way for acupuncture to measure and locate acupoints on anyone’s body. Since everyone’s body is of a different size and shape, using a person’s inborn measurement system makes finding the points a snap. The process starts with the measurement of one tsun/cun. This is done two ways: (a)using the width of the distal inter-phalangeal joint of the thumb (first finger) or (b)using the distance between the distal and proximal inter-phalangeal joints of the 3rd (middle) finger. All other specific measurements are outlined in the diagrams below. When in doubt in measuring, the thumb (1 tsun/cun) or the four finger method (3 tsun/cun) can always be used in a pinch.