Nanometre

Abbreviated as nm, unit of length equal to 10^-9 metres, and equal to 10 Å (Angstroms).

nanometre	Object
1,000,000 = 1 mm	Diameter of pin head
100,000	Width of a human hair
10,000	Size of red blood cell MEMS
1,000 = 1µm	Width of circuit lines on a chip
100	Size of a Virus
10	The distance between the head on a hard disk drive and the media.
1 = 1nm	diameter of a buckyball, diameter of DNA
0.1 = 1 Angstrom	diameter of hydrogen atom