Gauge - What does gauge mean?

Definition of GAUGE:

A standard unit of measure. A gauge is a unit of length measuring one-hundredth of a mil or one-hundred-thousandth of an inch (0.00001). 1 gauge is equivalent to 0.000254mm or 0.254μm (microns). This unit is most commonly used to describe the caliper (thickness) of thin plastics or metals; in labelling, it can be used to indicate the caliper of sheets of labels and the face and backing materials used to make label products.

Here is the Harvard-style citation to use if you would like to reference this definition of the word gauge:
Label Planet (2020) What does gauge mean? | Gauge Definition. Available at: https://www.labelplanet.co.uk/glossary/gauge/ (Accessed: January 1, 2023).