Bacterial Cells. 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.
1 Installing a concrete paver patio averages between $8 and $15 per square foot.  Stone: The most natural option, stone comes in several sizes, textures, colors and styles. Most homeowners opt for stone to create a design-focused patio. Installing a stone paver patio averages between $4 and $8 per square foot.
Materials cost: $480 to $720; Average cost per square foot: $11 to $19; Material type, square footage and equipment used may result in higher costs for a total patio installation. Types of Stone Pavers. Stone pavers offer a natural look for patios and come in several varieties, including: Cobblestone - to create an old-fashioned look