Microscopic · #992 biggest of 1,014
How big is a red blood cell?
7.5 µm
A red blood cell measures 7.5 µm. That's about 75 viruses lined up end to end.
By the numbers
- That's 7.5 micrometers (µm) — far too small to see with the naked eye.
- You'd need about 226,667 of them stacked up to reach the height of an average adult.
- Roughly 75 viruses could line up across it.
- Out of all 1,014 things in this collection, it ranks #992 by size.
Size comparison
How red blood cell stacks up against things of a similar size. Tap any bar to explore it.
skin cell
30 µm
white blood cell
15 µm
fog droplet
10 µm
red blood cell
7.5 µm
red blood cell
7.5 µm
chloroplast
5.0 µm
yeast cell
4.0 µm
bacterium (E. coli)
2.0 µm
mitochondrion
1.0 µm
Bars use a logarithmic scale so everything fits — real differences are even more extreme!
Fun fact
It's so small that about 133 of them would fit across a single millimeter.
More in Microscopic
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