What is yarn count?

The count is nothing but a numerical expression that defines the thinness or thickness of a yarn. It means that the yarn count refers to the amount of yarn available. The yarn count number indicates the length of yarn in relation to the weight.

But according to the Textile Institute, they define yarn count as “A number indicating the mass per unit length or length per unit mass of a yarn”.

Yarn count is also known as yarn number or linear density.