What is GSM in fabric ?

Understanding GSM in Fabric: A Comprehensive Guide


When shopping for fabric-based products, you may have come across the term ‘GSM’. But what does it mean and why is it important? In this blog post, we will delve into the concept of GSM in fabric and its significance in the textile industry.

What is GSM?

GSM stands for 'Grams per Square Meter’1234. It is a unit of measurement that quantifies the weight or density of a fabric1234. In simpler terms, GSM tells you how many grams one square meter of fabric weighs3.

Importance of GSM

GSM is a crucial metric in the textile industry as it provides insight into the weight, thickness, and quality of a fabric52. It helps manufacturers maintain quality control, ensuring the material does not contain significant holes or errors1. For consumers, it indicates how heavy or dense a piece of fabric is1.

How is GSM Measured?

GSM is measured by weighing a 1 meter by 1 meter square piece of the fabric2. This metric measurement has become the international standard for most clothing and home goods manufacturers1.

GSM Categories

Based on GSM, fabrics can be grouped into three categories:

  1. Lightweight fabrics (30 to 150 GSM): These fabrics may have some transparency and include materials like silk, chiffon, lace, mesh, linen, and some kinds of cotton1.
  2. Medium-weight materials (150-350 GSM): This category includes fabrics like velvet, heavy satin, sateen, denim, and some jersey knits1.
  3. Heavyweight fabrics (over 350 GSM): These are denser fabrics and include canvas, some kinds of brocades, most upholstery fabric, and most outdoor use fabric1.

GSM and Costing

The cost of fabric can vary according to its GSM2. A heavier fabric will cost more than a lighter version of the same material most of the time1. This is because the heavier material contains a denser, thicker amount of thread that costs the manufacturer more1.


Understanding GSM is essential for both manufacturers and consumers. It helps manufacturers maintain quality control and allows consumers to make informed decisions when purchasing fabric products. So, the next time you’re shopping for fabric items, don’t forget to check the GSM!


1: Silver Bobbin 2: SewGuide 5: Set Comforts 3: Fabricerie 4: Cotton and Cloud

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