is no single unit of measurement for location
of relief points as the size and shape vary from person to person.
To counteract this problem a new unit of
measurement came into existence called Acupressure-inch
(Ai). It is based on an individual person depending upon
the ratio-proportion of his/her body parts.
The distance from mid-point of eyebrows
to the highest point of the natural hairline at
the forehead is equal to three Ai.
The distance from the farthest wrist
fold to the outer corner point of the bent elbow
is equal to twelve Ai.
The distance from the highest point
bone on the outer side of feet to the bottom
of the heel is three Ai.
The width of four fingers measured
across the knuckles is three Ai.
understanding these measurements one can judge the
actual length of the Acupressure-inch (Ai) on