When users buy a needle, they usually mention the needle of size X, which is the needle size specification. Needle size, used to distinguish different sewing machine needles, indicates the diameter of the needle body. There are three ways to express the number of needles of sewing machines: number system, metric system, and inch system.
The numbering system, also referred to as the so-called "Singer system", is developed based on the numbering system of related parts of Singer sewing machines in the United States. It is the most common way for users to express the needle number. thick.
The metric system uses one hundredth of a millimeter as the basic unit to measure the needle body diameter; the imperial system is similar to the metric system in that it uses one thousandth of an inch as the basic unit to measure the needle body diameter.
