Cubit
The cubit is an ancient unit of length that had several definitions according to each of the various cultures that used the unit. These definitions typically ranged between 444 and 529.2 mm (17.48 and 20.83 in), with an ancient Roman cubit being as long as 120 cm (47 in). The shorter unit – common cubit – was based on the forearm length from the tip of the middle finger to the bottom of the elbow and was divided as 6 palms × 4 fingers = 24 digits.
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