You have probably seen the statistic. One cotton T-shirt takes around 2,700 litres of water to produce — about what a person drinks in two and a half years.

It is a real figure from real research, and it is used badly almost every time it appears. The number is not wrong. It is just doing less work than people think.

You have probably seen it on a product page and scrolled straight past it. 180 GSM. 220 GSM. Three letters and a number that tell you more about how a T-shirt will age than the price tag does.

GSM stands for grams per square metre — the weight of one square metre of the fabric. That is the whole definition. But that single number quietly decides whether your shirt drapes or clings, whether it survives a summer or a decade, and whether you can see your skin through it in daylight.

When it comes to finding the perfect T-shirt, fit is everything. At Tarsah, we take pride in offering high-quality cotton tees that not only look good but feel great. One of the most important steps in picking the right T-shirt is understanding the fit type. Whether you’re shopping for everyday basics or curating a capsule wardrobe, this guide will help you find the style that suits you best.