To help compare different orders of magnitude this page lists lengths between 10 nm and 100 nm (10^-8 and 10^-7 m). See also lengths of other orders of magnitude.

Distances shorter than 10 nm
20 nm -- thickness of bacterial flagellum
40 nm -- extreme ultraviolet wavelength
90 nm -- Human immunodeficiency virus (HIV) (generally, viruses range in size from 20 nm to 450 nm)
100 nm -- 90% of the particles of wood smoke are smaller than 100 nm
Distances longer than 100 nm