Quite a contrast to the definition of GSM in regards to mobile phones, GSM in linens stands for grams per square metre. This is, and I quote, βis simply the metric measurement of the weight of a fabric [1]β. read more
In short, GSM refers to the fabric weight and density of your towel in grams-per-square-meter. A towel with a higher GSM measurement is thicker and plusher than one with a low GSM, meaning it can absorb more water due to the higher pile and is usually made from a more luxurious type of cotton. read more