When a factory asks what GSM you want, they’re asking how heavy your fabric should be — and it’s one of the biggest decisions for how your garment feels. Here’s a plain-English guide.
What GSM means
GSM = grams per square metre — the fabric’s weight. Lower GSM = lighter, thinner, more breathable. Higher GSM = heavier, thicker, more premium-feeling and durable. It’s not “better or worse,” it’s fit-for-purpose.
Rough GSM guide for knit basics
| Garment | Typical GSM | Feel |
|---|---|---|
| Lightweight tee | 140–160 | Thin, breathable, summer |
| Standard tee | 160–200 | The everyday sweet spot |
| Premium / heavyweight tee | 200–240+ | Structured, boxy, premium |
| Pique polo | 180–220 | Classic polo body |
How to choose
- Match your market — fashion/streetwear leans heavier (200+); basics and hot climates lean lighter.
- Heavier fabric costs more (more fibre) — balance feel against price.
- Always judge GSM on a physical sample, not a number on paper.
Not sure which weight suits your product? We’ll send samples across a GSM range so you can feel the difference. Ask for samples.