Correction for the weight of an American Football
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How heavy is 24 stones?
It's about 350 times as heavy as an American Football
The weight of an American Football is about 0.06473214285714 stones.
(a.k.a. "pigskin") (NFL standard)
Per National Football League official rules, an American football must weigh between 0.0625 stones and 0.06696428571429 stones. Because of NFL regulations, ceremonial considerations, and backup requirements, each NFL Superbowl requires the manufacture of 144 balls exclusively for the event.