How big is Human hair (width)?

Human hair (width) is about 70 µm, or ≈ 660,000 hydrogen atoms. Hair ranges from about 17 to 180 micrometres thick. This is a typical strand, seen end-on.

All things · The Edge of Sight

Human hair (width): how big is it?

Human hair (width) is about 70 µm. In everyday terms, that is ≈ 660,000 hydrogen atoms.

Size: 70 µm
In metres: 7.00 × 10⁻⁵ m
Everyday comparison: ≈ 660,000 hydrogen atoms
Chapter: The Edge of Sight

Did you know?

Hair ranges from about 17 to 180 micrometres thick. This is a typical strand, seen end-on.

How it compares

About 2× bigger than Sunflower pollen (35 µm).
About 1.7× smaller than Human egg cell (120 µm).

See it on the zoom

Other things of a similar size

White blood cell 12 µm
Skin cell 30 µm
Sunflower pollen 35 µm
Human egg cell 120 µm
Paramecium 220 µm
Dust mite 250 µm

Sizes are rounded, typical values drawn from standard reference sources, including NIST/CODATA physical constants and NASA's planetary fact sheets. Real objects vary; see About for how sizes are chosen.