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Worsted count (or spinning count) is an indirect measure of the fineness of the fiber in a worsted wool yarn expressed as the number of 560-yard (512 m) lengths (hanks) of worsted yarn that a pound (0.45 kg) of wool yields. The finer the wool, the more yarn and the higher the count. It has been largely replaced by direct measures.
Spinning count is a measure of fiber fineness and distribution developed by the English. It is defined as the number of hanks of yarn that can be spun from a pound of wool.
A hank of wool is 560 yards long (560 yd/lb = 1.129 km/kg). In theory
a pound of 62s wool could produce 34720 yards of yarn. As it is now a
relatively simple matter to measure the average fiber diameter and
distribution, spinning count is being replaced with the specification of
average fiber diameter in micrometers and fiber distribution in standard