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  2. Orders of magnitude (length) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(length)

    The millimetre (SI symbol: mm) is a unit of length in the metric system equal to 10 −3 metres (⁠ 1 / 1 000 ⁠ m = 0.001 m). To help compare different orders of magnitude, this section lists lengths between 10 −3 m and 10 −2 m (1 mm and 1 cm). 1.0 mm – 1/1,000 of a meter; 1.0 mm – 0.03937 inches or 5/127 (exactly)

  3. Inch - Wikipedia

    en.wikipedia.org/wiki/Inch

    2.54 centimeters (1 inch is exactly 2.54 cm) 25.4 millimetres (1 inch is exactly 25.4 mm) ⁠ 1 / 12 ⁠ or 0.08333 feet (approximately) ⁠ 1 / 36 ⁠ or 0.2777 yards (approximately) 10000 'tenths' [a] 1000 thou [b] or mil [c] 100 points [d] or gries [e] 72 PostScript points [f] 10, [g] [e] 12, [h] or 40 [i] lines; 6 computer picas [j] 3 ...

  4. Irish units of measurement - Wikipedia

    en.wikipedia.org/wiki/Irish_units_of_measurement

    0.7 cm 1/4 inch ordlach: thumb-length 1 ⁄ 12: 2.1 cm 0.8 in bas: palm 1 ⁄ 3: 8.4 cm 3.3 in dorn: fist 5 ⁄ 12 or 1 ⁄ 2: 10.4 or 12.5 cm 4 or 5 in troighid: foot 1 25 cm 9.9 in céim: step 2.5 62.5 cm 2 ft 1 in deiscéim[m] double-step 6 1.5 m 4 ft 11 in fertach: rod 12 3 m 9 ft 10 in forrach: 144 36 m 39.4 yards

  5. Measuring rod - Wikipedia

    en.wikipedia.org/wiki/Measuring_rod

    Excavations at Lothal dating to 2400 BCE have yielded one such ruler calibrated to about 1 ⁄ 16 inch (1.6 mm) [3] Ian Whitelaw (2007) holds that 'The Mohenjo-Daro ruler is divided into units corresponding to 1.32 inches (34 mm) and these are marked out in decimal subdivisions with remarkable accuracy—to within 0.005 inches (0.13 mm).

  6. French catheter scale - Wikipedia

    en.wikipedia.org/wiki/French_catheter_scale

    The Charrière is measured by the ''outer'' diameter, and is defined as 1 Fr = 1/3 mm, and thus 1 mm = 3 Fr; therefore the diameter of a round catheter in millimetres can be determined by dividing the French size by 3. [2] The French units roughly correspond to the outer circumference of the catheter (see table below).

  7. Foot (unit) - Wikipedia

    en.wikipedia.org/wiki/Foot_(unit)

    The foot of an adult European-American male is typically about 15.3% of his height, [10] giving a person of 175 cm (5 ft 9 in) a foot-length of about 268 mm (10.6 in), on average. Archaeologists believe that, in the past, the people of Egypt , India , and Mesopotamia preferred the cubit , while the people of Rome , Greece , and China preferred ...