What is GSM and why does it matter in fashion industry.

In Suits By BENNEVIS      Jan 17, 2026   

What is GSM and why does it matter in fashion industry.

If you’ve ever bought fabric or designer wear and come across the term GSM, you’re not alone in wondering what it really means. While style, color and cut get most of the attention in fashion, fabric weight plays a vital role especially when it comes to men’s suits, blazers and formalwear.

Let’s break it down

What does GSM mean?

GSM stand for grams per square metre. It refers to the weight of the fabric, specifically how may grams one square metre of that fabric weighs. In simple terms GSM tells you how thick or light the fabric is.

For example

• A cotton shirt may have a GSM of around 100-150
• A winter wool suit might have a GSM of 300 or more

So the higher GSM the heavier and thicker the fabric.

Why GSM matters in fashion – especially for menswear

1. Determines seasonality

A higher GSM fabric like heavy wool or velvet is ideal for winter suits and weddings outfits. In contrast low GSM fabrics such as linen are lightweight cotton are perfect for summer or tropical climates.

At Bennevis we consider GSM when crafting suits for both functionality and elegance, whether it’s a breathable factory party blazer or a rich velvet tuxedo.

2. Impacts drape and structure

GSM directly affects how a suit sits on the body

• A higher GSM gives the garment a structured sharper drape essential for formal blazers and tuxedos.
• A lower GSM results in a more relaxed fit better for casual jackets or indo western fusion looks.

3. Durability and longevity

Higher GSM fabrics tend to be more durable, meaning they’ll hold up better overtime especially with frequent wear. That’s why formal trousers or bandhgalas are meant for long events are usually made from fabrics with higher GSM counts.

4. Feel and finish

Fabric with appropriate GSM also feels more luxurious. Too tight and a suit may seem flimsy; too heavy and it can be uncomfortable. The key is finding the perfect balance based on the purpose of the garment.

Final word

In fashion details matter and GSM is one of those behind the scenes factors that make a huge difference. Next time you try on a suit pay attention to the fabric feel and weight. It might just change the way you shop.

Bennevis suits are not just designed they are engineered.