Animals, In Order of Magnitude
| Order of Magnitude |
Size |
Example |
Observed With |
| 10¹ m |
10–30 m |
Blue Whale |
Naked eye |
| 10⁰ m |
1–10 m |
Elephant |
Naked eye |
| 10⁻¹ m |
10–100 cm |
Penguin |
Naked eye |
| 10⁻² m |
1–10 cm |
Hummingbird |
Naked eye |
| 10⁻³ m |
1–10 mm |
Ant |
Naked eye |
| 10⁻⁴ m |
0.1–1 mm |
Tardigrade |
Naked eye (barely) |
| 10⁻⁵ m |
10–100 µm |
Paramecium |
Naked eye (barely) |
| 10⁻⁶ m |
1–10 µm |
E. coli / Mimivirus |
Light microscope |
| 10⁻⁷ m |
100–999 nm |
Poxvirus |
Electron microscope |
| 10⁻⁸ m |
10–100 nm |
Influenza |
Electron microscope |
| 10⁻⁹ m |
~20 nm |
Parvovirus |
Electron microscope |