Correction for the size of a Golf Ball (packed)
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How big is 13.530 gills?
It's about thirty times as big as a Golf Ball (packed)
The size of a Golf Ball (packed) is about 0.5373837030 gills.
(64% packing density) (per R&A-USGA Rules of Golf)
Dictated by 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 0.3439224250 gills. 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.