A micron (micrometre) is the measurement used to express the diameter of wool fibre. Fine wool fibers have a low micron value. Fibre diameter is the most important characteristic of wool in determining its value. Weaner and hogget wool is finer and generally more valuable than the wool from older sheep. Most wool between 11.5 and 24 microns in fibre diameter is made into clothing. The remainder is used for other textiles such as blankets, insulation and furnishings.