Body · #989 biggest of 1,014
How big is a white blood cell?
15 µm
A white blood cell measures 15 µm. That's about 150 viruses lined up end to end.
By the numbers
- That's 15 micrometers (µm) — far too small to see with the naked eye.
- You'd need about 113,333 of them stacked up to reach the height of an average adult.
- Roughly 150 viruses could line up across it.
- Out of all 1,014 things in this collection, it ranks #989 by size.
Size comparison
How white blood cell stacks up against things of a similar size. Tap any bar to explore it.
pixel on a phone screen
60 µm
sperm cell
50 µm
dust particle
50 µm
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
Bars use a logarithmic scale so everything fits — real differences are even more extreme!
Fun fact
It's so small that about 67 of them would fit across a single millimeter.
More in Body
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