A finger (sometimes finger-breadth), when used as a unit, is usually seven eighth of an inch or 2.2225 cm (for the international inch). The width of an adult human male finger tip is indeed about 2 centimetres. 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 (6/7 finger), palm (24/7 finger), hand (32/7 fingers), shaftment (48/7 fingers), span (72/7 fingers), cubit (144/7 fingers) and ell (360/7 fingers). Jump to: navigation, search Mid-19th century tool for converting between different standards of the inch An inch is an Imperial and U.S. customary unit of length. ... To help compare different orders of magnitude this page lists lengths between 10-2 m and 10-1 m (1 cm and 10 cm). ... Jump to: navigation, search Mid-19th century tool for converting between different standards of the inch An inch is an Imperial and U.S. customary unit of length. ... A digit (lat. ... Three archaic hand units of measurment: 1: Palm * 2: Span 3: Hand * In English, a Palm is commonly used to represent four fingers held together. ... A hand (or handbreadth) is a unit of length measurement, usually based on the breadth of a male human hand and thus around 1 dm, i. ... A shaftment, when used as a unit of length, is usually six inches or two palms, i. ... In aircraft design, see Wingspan. ... Cubit is the name for any one of many units of measure used by various ancient peoples, based on the distance between the tip of the middle finger and the elbow on an average person or a similar forearm-based measurement. ... An ell, when used as a unit of length, is usually 45 inches, i. ...