Question: how small are bacteria cells?
Answer: Bacterial cells are very small - about 10 times smaller than most plant and animal cells. Most bacterial cells range in size from 0.2 to 10 microns or micrometers (0.0000079 to 0.00039 inches). Common Escherichia coli, or E. coli, bacteria are rod-shaped bacteria, 1 micron by 2 microns long.