There are four essential parameters determine the quality of Cashmere fiber: length, diameter, color and the proportion of guard hairs that remain in the raw material. An individual hair may be up to 75 millimeters long. Generally, the length of hair of a very high-quality fiber is between 36-38 millimeters. The diameter of particularly fine hairs varies between 14 and 18 microns. The average diameter of our Cashmere can reach 15.5um and 38mm in average length. The longer and thinner the fiber of the raw material, the more valuable the Cashmere thread spun from it. Color is also a quality-determining factor. Naturally white Cashmere is the most valuable because it is the most able to accept dye and hold the color without fading.