Yarn count refers to the thickness of a yarn and is determined by its mass per unit length. It is usually measured by the number of grams per specified length of yarn.
There are several count systems for yarns that we can divided into two groups with three different measures in each:
1. Direct Systems (Lengths)
a. Tex: This is the universal system where 1 000m lengths are weighed to determine the count.
b. Denier: This measure is used for all synthetic fibres where 9 000m of yarn is weighed to determine the count
c. Pounds per Spindle: Count for the United States that uses the Imperial system where 1 440 yards get weighed to produce the sum of the count in pounds
2. Indirect Systems (Weight)
a. English Cotton Count: The number of hanks of 840 yards present in 1 pound of yarn
b. Metric Count: The number of hanks of 1 000 meters present in 1 kilogram of yarn.
c. Worsted Count: The number of hanks of 560 yards present in 1 pound of yarn used for wool.