Is 623 leagues as long as a Bowling Pin?
It's about 9,000,000 times as tall as a Bowling Pin
The height of a Bowling Pin is about 0.00006860 leagues.
(USBC specifications; tenpin)
According to the United States Bowling Congress specifications, a tenpin bowling pin should be within 0.0000001430 leagues of 0.00006860 leagues in height. The USBC further mandates that certified pins be made of sugar maple wood, unless otherwise approved by the organization.
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