• @macgyveringIt@lemmy.sdf.org
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      911 months ago

      And know the sizes of some common items; paper currency, coins, hand, arm, length of stride. You can use these to get a close approximation.

    • @teruma@lemmy.world
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      311 months ago

      My hand span is exactly 7", and my thumb knuckles are exactly 1" long, with the nailbed exactly halfway back.