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Finger (Unit)A finger (sometimes finger-breadth), when used as a unit, is usually seven eighth of an inch or 2.2225cm (for the international inch). The width of an adult human male finger tip is indeed about 2centimetres. The inch, on the other hand, originates in the breadth of a thumb. In English this unit has mostly fallen out of use, as do others based on the human arm: digit (6/7finger), palm (24/7finger), hand (32/7fingers), shaftment (48/7fingers), span (72/7fingers), cubit (144/7fingers) and ell (360/7fingers).
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