• Shorter lengths
• 10 µm -- Width of cotton fibre
• 10.6 µm -- wavelength of light emitted by a carbon dioxide laser
• 12 µm -- Width of acrylic fibre
• 13 µm -- Width of nylon fibre
• 14 µm -- Width of polyester fibre
• 15 µm -- Width of silk fibre
• 17 µm -- Dust mite excreta ¹
• 20 µm -- Width of wool fibre
• 25.4 µm -- 1/1000 inch, commonly referred to as 1 mil
• 50 µm -- typical length of Euglena gracilis, a flagellate protist
• 80 µm -- average width of human hair (ranges from 18 to 180 µm)
• Longer lengths

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