What is GSM in thickness?

GSM stands for "grams per square meter" and is a measurement used to indicate the weight of fabric, paper, or other materials. It reflects the density and thickness of the material; higher GSM values typically denote thicker and heavier materials, while lower values indicate lighter, thinner options. In textiles, a GSM of around 150-200 is common for t-shirts, while heavier fabrics like towels can range from 400 GSM and above.