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Whatever it is, if it measures 1,000th of a millimeter wide, it is 1 micron wide. Examples of some small measurements: A typical human hair is 100 microns wide (a 1/10th of a millimeter). A red blood cell is 7 microns wide (less than 1/100th of a millimeter). Here's a neat interactive video of small things for you: http://www.cellsalive.com/howbig.htm A staphylococcus bacteria in the video looks to be just under 1 micron wide. Most viruses are much, much smaller still!

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16y ago

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