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Is 30 square centimeters as big as a Playing Card?

It's about half as big as a Playing Card
The size of a Playing Card is about 56 square centimeters.
(ISO 216 B8 size)
A single ISO 216 B8-size playing card measures 56 sq. cm. Although this size is the most common playing card, many casinos use the smaller "bridge size" card — 26 square centimeters smaller.
There's more! See other comparisons to 30 square centimeters...