How big is a micrometer

10 micrometers

To help compare different orders of magnitude, this lists lengths between 10−5 m and 10−4 m (10 µm and 100 µm).

  • 10 µm – width of cotton fiber
  • 10 µm – transistor width of the Intel 4004, the world's first commercial microprocessors
  • 10 µm – mean longest dimension of a human red blood cell
  • 5–20 µm – dust mite excreta[37]
  • 10.6 µm – wavelength of light emitted by a carbon dioxide laser
  • 15 µm – width of silk fiber
  • 17 µm – minimum width of a strand of human hair
  • 17.6 µm – one twip, a unit of length in typography
  • 10 to 55 µm – width of wool fiber]
  • 25.4 µm – 1/1000 inch, commonly referred to as 1 mil in the U.S. and 1 thou in the UK
  • 50 µm – typical length of a human live cell, an average-sized body cell
  • 70 to 180 µm – thickness of paper

100 micrometers

To help compare different orders of magnitude, this lists lengths between 10−4 m and 10−3 m (100 µm and 1 mm).

  • 100 µm – 1/10 of a millimeter
  • 100 µm – 0.00394 inches
  • 100 µm – average diameter of a strand of human hair
  • 100 µm – thickness of a coat of paint
  • 100 µm – length of a dust particle
  • 181 µm – maximum width of a strand of human hair
  • 100–400 µm – length of Demodex mites living in human hair follicles
  • 250–300 µm – length of a dust mite
  • 340 µm – length of a single pixel on a 17-inch monitor with a resolution of 1024×768
  • 560 µm - thickness of the central area of a human cornea
  • 760 µm – thickness of an identification card

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