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The pica is a typographic unit of measure corresponding to approximately 1⁄6 of an inch, or 1⁄72 of a foot. One pica is further divided into 12 points.
A finger (sometimes fingerbreadth or finger's breadth) is any of several units of measurement that are approximately the width of an adult human finger, including:
The digit, also known as digitus or digitus transversus (Latin), dactyl (Greek) or dactylus, or finger's breadth — 3⁄4 of an inch or 1⁄16 of a foot.