What Do Sewing Machine Needle Sizes Mean?

The Sizing Systems The sizes are found on the front of the packaging (circled in red ) That first number is the Number Metric (shown as NM). This system was set up in the 1940's to standardize needle sizes. It is simply the diameter of the needle shaft in millimeters multiplied by 100 to get rid of the pesky decimal places. That means that our standard "80" needle is really .80mm in diameter. (You're glad you asked, right?) The larger the needle size, the stronger and thicker the shaft. So where does the '12' of the 80/12 name come from? It is nothing more than the merging of two measuring systems. The '12' comes from the corresponding Singer or US needle system. The '80', as we've learned, is the diameter of the shaft in millimeters multiplied by 100. Here are
The Sizing Systems The sizes are found on the front of the packaging (circled in red ) That first number is the Number Metric (shown

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