The weight of the ball
must not be greater than 1.620 ounces avoirdupois (45.93 gm).
The diameter of the ball
must not be less than 1.680 inches (42.67 mm). This
specification will be satisfied if, under its own weight, a ball
falls through a 1.680 inches diameter ring gauge in fewer than
25 out of 100 randomly selected positions, the test being
carried out at a temperature of 23 + 1°C.
The ball must not be
designed, manufactured or intentionally modified to have
properties which differ from those of a spherically symmetrical
ball.
The initial velocity of
the ball must not exceed the limit specified (test on file) when
measured on apparatus approved by the United States Golf
Association.
5. Overall Distance Standard
The combined carry and
roll of the ball, when tested on apparatus approved by the
United States Golf Association, must not exceed the distance
specified under the conditions set forth in the Overall Distance
Standard for golf balls on file with the United States Golf
Association.
