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To help compare different orders of magnitude this page lists lengths between 10⁻⁷ and 10⁻⁶ m (100 nm and 1 µm).

100 nm — greatest particle size that can fit through a surgical mask^{citation needed}
120 nm — greatest particle size that can fit through a ULPA filter^{citation needed}
125 nm — standard depth of pits on compact discs (width: 500 nm, length: 850 nm to 3.5 µm)
180 nm — typical length of the rabies virus
200 nm — typical size of a Mycoplasma bacterium, among the smallest bacteria
280 nm — near ultraviolet wavelength
300 nm — greatest particle size that can fit through a HEPA (High Efficiency Particulate Air) filter (N100 removes up to 99.97% at 0.3 micrometres, N95 removes up to 95% at 0.3 micrometres)^{citation needed}
380-420 nm — wavelength of violet light (see color and optical spectrum)
420-440 nm — wavelength of indigo light
440-500 nm — wavelength of blue light
500-520 nm — wavelength of cyan light
520-565 nm — wavelength of green light
565-590 nm — wavelength of yellow light
590-625 nm — wavelength of orange light
625-740 nm — wavelength of red light

See also