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Is 415.530 pinches as big as a Golf Ball?

It's about six-and-a-half times as big as a Golf Ball
The size of a Golf Ball is about 66.033709 pinches.
(per R&A-USGA Rules of Golf)
According to the Rules of Golf (as approved by the United States Golf Association and the Rules Committee of the Royal and Ancient Golf Club of Saint Andrews), a golf ball must have a volume of at least 66.033106 pinches. Golf balls are not required to have the familiar dimpled pattern, but the design has been popular since its invention in 1905 because it reduces drag while increasing lift.
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