Textile Glossary · Measurement · Fabric Density
GSM (Grams per Square Metre)
/dʒiː ɛs ɛm/
GSM — grams per square metre — is the universal measurement for fabric weight and density. It tells you how much material is packed into every square metre of cloth.
Understanding the Term
What GSM actually tells you.
GSM measures the mass of fabric per unit area. A 120 GSM t-shirt feels thin and airy — fine for layering, questionable on its own. A 220 GSM t-shirt has heft, almost jacket-like. Neither is inherently better. The question is what you need the garment to do.
Most premium t-shirts land between 160 and 200 GSM. This range balances structure with comfort — heavy enough to drape properly without clinging, light enough to wear year-round. The number alone doesn't predict quality, but it does predict how a shirt behaves on your body.
GSM also determines how a fabric ages. Lighter fabrics pill faster because there's less fibre to absorb friction. Heavier fabrics resist deformation but can feel stiff if the cotton quality is poor. The sweet spot depends entirely on the raw material.
Why It Matters
How GSM affects your t-shirt experience.
The number most people ignore — and shouldn't.
01
Drape & Structure
Higher GSM creates a cleaner silhouette. The fabric holds its shape rather than conforming to every contour. At 180 GSM, you get structure without rigidity.
02
Longevity
Denser fabric means more fibre per area, which means more resistance to friction, stretching, and wash-cycle stress. A 180 GSM Supima shirt outlasts a 140 GSM conventional cotton shirt by years.
03
Opacity & Comfort
Nobody wants a see-through t-shirt. At 180 GSM, you get full opacity in every colour, including white, without the weight penalty of heavyweight fabrics.
Our Standard
Why we chose 180 GSM.
We tested every weight from 140 to 240 GSM over two years. At 180, Supima cotton hits its equilibrium — the fibres lie flat, the mercerised finish holds its sheen, and the garment moves with you rather than against you. Anything lighter sacrificed opacity. Anything heavier sacrificed drape.
180
GSM
Our signature midweight — the sweet spot between structure and breathability
Related Terms
Explore more textile terminology.
See how Supima compares:
Common Questions
GSM — your questions, answered.
Common questions about fabric weight and density.
160–200 GSM is the ideal range for year-round wear. Below 160 feels flimsy; above 200 starts feeling heavy in warm weather. Our 180 GSM sits dead centre.
See It in Practice
180 GSM Supima cotton.
Feel the weight of quality.
Numbers on a page only go so far. The real test is putting it on.
Free returns · 30 washes guaranteed · ₹1,299
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