Spacecraft · #270 biggest of 1,014
How big is the James Webb Space Telescope?
20 m
The James Webb Space Telescope measures 20 m. That's about 12 adult humans lined up end to end.
By the numbers
- That's 20 meters, or about 66 feet.
- It's about 12 times taller than an average adult (1.7 m).
- Roughly 12 adult humans could line up across it.
- Out of all 1,014 things in this collection, it ranks #270 by size.
Size comparison
How James Webb Space Telescope stacks up against things of a similar size. Tap any bar to explore it.
semi-truck
22 m
Chelyabinsk meteor
20 m
birch tree
20 m
Sphinx of Giza
20 m
James Webb Space Telescope
20 m
fighter jet
19 m
bowling lane
18.3 m
sperm whale
18 m
Megalodon (shark)
18 m
Bars use a logarithmic scale so everything fits — real differences are even more extreme!
Fun fact
Standing beside it, an average person (1.7 m tall) would reach only about 8.5% of its height.
More in Spacecraft
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