70 µm hair
A hair is a slender strand of protein that grows from the skin of humans and other mammals.
How big is it?
70 µm across
Also 0.002756 in
Diameter · example
A little perspective
Sheet of paper is about 1.43 times larger on this measurement.
Sheet of paper: A sheet of paper is a flat material made from cellulose pulp, used for writing, printing or packaging.
Measurements, assumptions & sources +
70 µm hair
A 70 µm diameter example; hair thickness varies.
Defined examples — our methodology
The marked diameter is calibrated. Unmeasured illustration details are representative.
Sheet of paper
A 0.1 mm thick sheet. Paper stock and compression change thickness.
Defined examples — our methodology
The marked thickness is calibrated. Unmeasured illustration details are representative.
Change your perspective
Put it next to…
Choose a suggestion to redraw the comparison, or open its page to learn what it is.
Why this measurement?
Why we use 70 µm
For comparison, this page uses diameter. This is labelled example: an explicit comparison model rather than a claim that every example has the same value.
A 70 µm diameter example; hair thickness varies.
The marked vertical span follows the named feature; transparent margins and unmeasured details do not alter it. How calibrated comparisons work →
Recorded properties
70 µm hair dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 70 µm | Not recorded | example |
Around this scale
Go smaller. Go bigger.
These links use compatible length records, ordered around the selected value.
Nearest lower value · PeopleSperm cell50 µmA sperm cell is a male reproductive cell with a compact head, energy-producing midpiece and a flagellum used for movement.
Nearest higher value · Everyday thingsSheet of paper100 µmA sheet of paper is a flat material made from cellulose pulp, used for writing, printing or packaging.Sources and method
Want to check the number?
The source records and measurement method remain available for inspection.
More ways to see it
Curated comparisons
There’s always another scale
Follow your curiosity.
Everyday thingsSheet of paper100 µmA sheet of paper is a flat material made from cellulose pulp, used for writing, printing or packaging.
MicroscopicPollen grain30 µmA pollen grain carries the male reproductive cells of a seed-producing plant.
MicroscopicSalt crystal300 µmA salt crystal is a small, naturally occurring or manufactured piece of sodium chloride used in food and industry.PeopleSperm cell50 µmA sperm cell is a male reproductive cell with a compact head, energy-producing midpiece and a flagellum used for movement.
MicroscopicDust particle10 µmDust is a mixture of tiny solid particles from sources such as soil, fibres, skin and pollen.
Living thingsPoppy seed1 mmA poppy seed is an edible seed produced by plants in the poppy family and commonly used in breads and other foods.
Microscopic10 µm cell10 µmA cell is the basic structural unit of living organisms.
MicroscopicRed blood cell7.5 µmA red blood cell is a specialised blood cell that transports oxygen using haemoglobin.