Correction for the size of a Playing Card
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How big is 140.320 circular mils?
It's about one-seventy-five-thousandth as big as a Playing Card
The size of a Playing Card is about 11,000,000 circular mils.
(ISO 216 B8 size)
A single ISO 216 B8-size playing card measures 11,000,000 circular mils. Although this size is the most common playing card, many casinos use the smaller "bridge size" card — 5,200,000 circular mils smaller.