Yarns that are produced for knitting are typically labelled with two numbers in what is often referred to as the ‘yarn count’. For example, on your index™ care label you may recognize the numbers 12/1, 20/1, 24/1, or 24/2. The second number indicates the number of plies of the yarn; a single yarn is designated with a 1, a two-ply yarn with a 2. The first number indicates the size of the singles in the yarn - regardless of fabric type, size 1 is the thickest and the higher the count, the thinner the yarn. Furthermore, the greater the number of plies, the thicker the yarn.