Animals, In Order of Magnitude

08 Mar, 2026

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