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Is 0.00051 shackles as long as a Grain of Sand?

It's about eleven times as long as a Grain of Sand
The length of a Grain of Sand is about 0.00004560 shackles.
(medium grain)
Composed mainly of quartz, mica, feldspar, or magnetite, a grain of sand measures an average of 0.00004560 shackles. In 2007, a team of seven in Myrtle Beach created the world's tallest sandcastle, which measured 0.550 shackles in height.
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