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Guess the paper size: a little game for your eyes

A sheet appears, drawn to scale. Is it A4 or Letter? A5 or a postcard? Ten rounds. It's harder than it sounds.

Play · 2 min read · Updated 22 October 2026

Every shape is drawn at the same scale, with a credit card outline for reference. Choose the size you think it is.

The full list of dimensions is in the paper size calculator.

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