Standard Measurements used in Golf
Specifications of ball: Broadened to require that the ball be designed to perform as if it were spherically symmetrical. The weight of the ball shall not be greater than 1.620 ounces avoirdupois, and the size shall not be less than 1.680 inches in diameter. Velocity of ball: Not greater than 250 feet per second when tested on USGA apparatus, with 2 percent tolerance. Hole: 4 1/4 inches in diameter and at least 4 inches deep. Clubs: 14 is the maximum number permitted. Overall distance standard: A brand of ball shall not exceed a distance of 280 yards plus 6% when tested on USGA apparatus under specified conditions, on an outdoor range at USGA Headquarters.