For Comparison
| Item | Microns | Angstroms | X Virus |
| hydrogen atom | 0.0001 | 1 | 0.001 |
| globular protein | 0.004 | 40 | 0.04 |
| large virus | 0.1 | 1 x 104 | 1 |
| E. coli bacteria | 2 | 2 x 105 | 20 |
| sperm w/o tail | 1 x 5 | 1 x 105 by 5 x 105 |
10 x 50 |
| human red blood cell | 9 | 9 x 105 | 90 |
| somatic cells | 10-30 | 1-3 x 106 | 100-300 |
| amoeba | 90 | 9 x 106 | 900 |
| sea urchin and human egg | 100 | 1 x 107 | 1,000 |
| frog egg | 2000 | 2 x 108 | 20,000 |