"an official softball circumference is 12"...."
Only if one is playing 12" softball. While in college, I also played intramural 16" softball. The extra four inches adds another dimension to the game, with a larger and heavier ball. 16" rules at the time also did not require baseball gloves to be worn.
You can’t measure the bicep independently unless you remove it. 😆. When people say baseball size biceps they usually mean arms, but I get your point.
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