THE BASICS OF DUCKPINS     BALLS:                WEIGHT:  MAX  3lbs  12oz                          DIAMETER:  MIN 4 3/4 inches                                       MAX  5 inches   LANES:                APPROACH - MINIMUM OF 15 feet                 LANE BED -  60 feet FROM FOUL LINE TO THE HEAD PIN                                          A LANE BED IS NOT LESS THAN 41" WIDE.   PINS:                 HEIGHT - 9 1/2 "                 DIAMETER OF BASE - 1 3/8"                 DIAMETER OF BELLY - 4 1/8"                 WEIGHT - 1 1/2lbs   The pins are set in a 3-foot equilateral trinagle, measuring from center of pin to center of pin, namely, 1-7, 7-10, 1-10 triangle. The closest any two pins are to each other is 12" center to center. The distance from the 1 to the 5 pin is 20 3/4".