The micrometre is a common unit of measurement for wavelengths of infrared radiation as well as sizes of biological cells and bacteria and is also commonly used in plastics manufacturing. Micrometres are the standard for grading wool by the diameter of the fibres; wool finer than 25 μm can be used for garments, while coarser grades are used for outerwear, rugs, and carpets. The width of a single human hair ranges from approximately 10 to 200 μm. The first and longest human chromosome is 10μm in length.
meter × 100
meter / 100