grit vs microns vs mesh. pain in the butt. - BladeForums
This measurement seems agreed on. 1 micron = 1/1,000,000 of a meter, or, written out, one/one millionth of a meter. I keep finding size analogies for microns; "For Size comparison, a human red blood cell is about 5 microns across. A human hair is about 75 microns across (depending on the person)."