This comparison shows 19 objects drawn to scale. Drag the view to rotate it, or add your own items to the comparison.

| Object | As entered | Centimetres | Inches |
|---|---|---|---|
| Quark | 0 × 0 × 0 um | 0 × 0 × 0 cm | 0 × 0 × 0 in |
| Proton | 0 × 0 × 0 um | 0 × 0 × 0 cm | 0 × 0 × 0 in |
| Neutron | 0 × 0 × 0 um | 0 × 0 × 0 cm | 0 × 0 × 0 in |
| Atomic nucleus | 0 × 0 × 0 um | 0 × 0 × 0 cm | 0 × 0 × 0 in |
| Electron | 0 × 0 × 0 um | 0 × 0 × 0 cm | 0 × 0 × 0 in |
| Atom | 0.01 × 0.01 × 0.01 um | 0 × 0 × 0 cm | 0 × 0 × 0 in |
| Bromovirus | 1.6 × 1.5 × 1.5 um | 0 × 0 × 0 cm | 0 × 0 × 0 in |
| Bacteriophage | 4.9 × 4.8 × 4.8 um | 0 × 0 × 0 cm | 0 × 0 × 0 in |
| Coccus | 7.9 × 7.8 × 7.8 um | 0 × 0 × 0 cm | 0 × 0 × 0 in |
| Bacillus | 10.9 × 10.8 × 10.8 um | 0 × 0 × 0 cm | 0 × 0 × 0 in |
| Martian dust | 18.5 × 18.4 × 18.4 um | 0 × 0 × 0 cm | 0 × 0 × 0 in |
| Didinium | 50.0 × 49.0 × 49.0 um | 0.01 × 0 × 0 cm | 0 × 0 × 0 in |
| Rotifer | 68.1 × 68.0 × 68.1 um | 0.01 × 0.01 × 0.01 cm | 0 × 0 × 0 in |
| Tadigrade | 234 × 233 × 233 um | 0.02 × 0.02 × 0.02 cm | 0.01 × 0.01 × 0.01 in |
| Crumb | 0.6 × 0.5 × 0.5 mm | 0.06 × 0.05 × 0.05 cm | 0.02 × 0.02 × 0.02 in |
| Water drop | 1 × 0.9 × 0.9 mm | 0.1 × 0.09 × 0.09 cm | 0.04 × 0.04 × 0.04 in |
| Rabbit flea | 1.1 × 1 × 1 mm | 0.11 × 0.1 × 0.1 cm | 0.04 × 0.04 × 0.04 in |
| Water flea | 5 × 4 × 4 mm | 0.5 × 0.4 × 0.4 cm | 0.2 × 0.16 × 0.16 in |
| Rat flea | 6 × 5 × 5 mm | 0.6 × 0.5 × 0.5 cm | 0.24 × 0.2 × 0.2 in |

| Object | Volume | vs smallest |
|---|---|---|
| Quark | 1 × 10−24 mm³ | 1× |
| Proton | 5.8 × 10−22 mm³ | 576× |
| Neutron | 5.8 × 10−22 mm³ | 576× |
| Atomic nucleus | 7.1 × 10−19 mm³ | 712,890× |
| Electron | 6.6 × 10−17 mm³ | >1,000,000× |
| Atom | 7.1 × 10−16 mm³ | >1,000,000× |
| Bromovirus | 3.6 × 10−9 mm³ | >1,000,000× |
| Bacteriophage | 1.1 × 10−7 mm³ | >1,000,000× |
| Coccus | 4.8 × 10−7 mm³ | >1,000,000× |
| Bacillus | 1.3 × 10−6 mm³ | >1,000,000× |
| Martian dust | 6.3 × 10−6 mm³ | >1,000,000× |
| Didinium | 1.2 × 10−4 mm³ | >1,000,000× |
| Rotifer | 3.2 × 10−4 mm³ | >1,000,000× |
| Tadigrade | 1.3 × 10−2 mm³ | >1,000,000× |
| Crumb | 0.15 mm³ | >1,000,000× |
| Water drop | 0.81 mm³ | >1,000,000× |
| Rabbit flea | 1.1 mm³ | >1,000,000× |
| Water flea | 80.0 mm³ | >1,000,000× |
| Rat flea | 150 mm³ | >1,000,000× |
* Height × width × depth of the box each object fits in, not the object's own volume. Multiples are against the smallest box here, Quark. Anything beyond a million times bigger is shown as >1,000,000×.