This is the method used to describe the density (thickness) of the yarn and is traditionally given in “cotton count” e.g. 16’s, 30’s, 40’s. In this system the lower the count, the thicker the yarn, so a 16’s yarn will be thicker than a 40’s yarn. The higher counts e.g. 40’s, 60’s will be used in bedlinen and the lower counts in table linen. The metric system used to measure yarn density is the “tex” system which works in the opposite way whereby the higher the tex value the thicker the yarn.