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How Big Is a Human Hair?

A human hair is about 70 µm across. That is about 24,400 times smaller than the average man. The thickness of a single hair.

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How big is a human hair compared to the average man?

A human hair is about 24,400 times smaller than the average man. The average man is 24,400× the size of a human hair: about 24,400 human hair (width)s stacked up would match it.

Human Hair (Width) size facts

A human hair is about 0.07 mm (70 micrometers) thick, though it ranges from about 17 to 180 micrometers.

How does a human hair compare to other things?

A human hair next to 25 things of similar size, plus some everyday references:

Thing	Size	Compared to Human hair (width)
Sun	865,000 miles (1,393,000 km) across	19.9 trillion× bigger
Earth	7,920 miles (12,740 km) across	182 billion× bigger
Mount Everest	5.5 miles (8.849 km)	126 million× bigger
Eiffel Tower	1,083 ft (330 m)	4.71 million× bigger
School bus	40 ft (12.2 m) long	174,000× bigger
Average man (world)	5 ft 7 in (171 cm)	24,400× bigger
Average woman (world)	5 ft 3 in (159 cm)	22,700× bigger
Apple	3.1 in (8 cm) long	1,140× bigger
Baseball	2.9 in (7.4 cm) across	1,060× bigger
Tennis ball	2.6 in (6.7 cm) across	957× bigger
Wolf spider	2.4 in (6 cm) long	857× bigger
Bee hummingbird	2.2 in (5.5 cm) long	786× bigger
Golf ball	1.7 in (4.27 cm) across	610× bigger
US quarter	0.96 in (2.43 cm) across	347× bigger
Honeybee	0.59 in (1.5 cm) long	214× bigger
Ladybug	0.28 in (7 mm) long	100× bigger
Grain of rice	0.26 in (6.5 mm) long	92.9× bigger
Ant	0.16 in (4 mm) long	57.1× bigger
Flea	0.098 in (2.5 mm) long	35.7× bigger
Mustard seed	0.059 in (1.5 mm) across	21.4× bigger
Grain of sand	0.02 in (500 µm) long	7.1× bigger
Dust mite	0.012 in (300 µm) long	4.3× bigger
Red blood cell	7.5 µm across	9.3× smaller
E. coli bacterium	2 µm long	35× smaller
Virus	100 nm across	700× smaller

Where do these numbers come from?

Sizes are typical adult or reported values, rounded for readability. Read how we measure and compare sizes.