Centimeter (cm): The centimeter is equal to one one-hundredth of a meter (0.01 meters). It is commonly used for measuring shorter lengths, such as the height of a person or the dimensions of objects.
Nanometer (nm): The nanometer is equal to one one-billionth of a meter (0.000000001 meters). It is used to measure extremely small structures, such as molecules and nanoparticles.