All things · The Edge of Sight
Paramecium: how big is it?
Paramecium is about 220 µm. In everyday terms, that is ≈ 3.1 human hairs (width).
- Size
- 220 µm
- In metres
- 2.20 × 10⁻⁴ m
- Everyday comparison
- ≈ 3.1 human hairs (width)
- Chapter
- The Edge of Sight
Did you know?
A single-celled swimmer covered in thousands of tiny hairs called cilia, which beat like oars.
How it compares
- About 1.8× bigger than Human egg cell (120 µm).
- Roughly the same size as Dust mite (250 µm).
Other things of a similar size
- Sunflower pollen 35 µm
- Human hair (width) 70 µm
- Human egg cell 120 µm
- Dust mite 250 µm
- Tardigrade 450 µm
- Grain of sand 600 µm
Sizes are rounded, typical values drawn from standard reference sources, including NIST/CODATA physical constants and NASA's planetary fact sheets. Real objects vary; see About for how sizes are chosen.