GSM means and how to use it The GSM test is a measurement of Grams per Square Meter, and is one of the most important methods of determining the weights of knitting fabric, non-woven fabric or paper cardboard. The GSM Cutter is a textile testing instrument which is used for measuring fabric GSM with the aid of a weighing scale and GSM pad. The GSM cutter is a circular fabric sample cutter. With th...