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30 shackles is about 2,000 times as tall as a Bowling Pin.
In other words, it's 2,160 times the height of a Bowling Pin, and the height of a Bowling Pin is 0.000463 times that amount.
(USBC specifications; tenpin)
According to the United States Bowling Congress specifications, a tenpin bowling pin should be within 0.00002890 shackles of 0.0139 shackles 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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