When you're buying fabric—whether for dressmaking, DIY crafts, or home décor—it's easy to get swept up in prints and textures. But one factor that's just as important as colour or style is fabric weight, usually measured in GSM. If you’ve ever ended up with a fabric that was too flimsy or way heavier than expected, this blog is for you.
At CheapFabrics.co.uk, we believe in empowering makers of all levels to choose the right fabric for every project. So let’s break down why fabric weight matters—and how to make sense of GSM.
What Is GSM?
GSM stands for Grams per Square Metre, and it tells you the weight of the fabric. In simple terms, it’s how heavy a one-metre square piece of the fabric is.
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Lightweight fabrics: 30–150 GSM (e.g., chiffon, voile, cotton lawn)
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Medium weight fabrics: 150–300 GSM (e.g., poplin, jersey, twill)
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Heavyweight fabrics: 300+ GSM (e.g., denim, upholstery, wool coating)
Knowing the GSM can help you predict how the fabric will drape, feel, and perform before you even touch it.
Why Does Fabric Weight Matter?
1. It Affects the Drape
A floaty summer dress needs something lightweight like rayon or viscose. Use a heavyweight twill, and suddenly you're sweating in a stiff outfit that doesn’t move with you.
2. It Influences Comfort
Breathable, lighter fabrics are ideal for warm weather, while heavier fabrics provide structure and warmth for coats, trousers, or upholstery.
3. It Impacts Sewing and Handling
Beginners often find lightweight fabrics tricky—they can slip or pucker. On the other hand, very heavy fabrics may require stronger needles and more durable machines.
4. It Determines Use
Need fabric for curtains, a tailored blazer, or cushion covers? You’ll need something with body and structure. Making a blouse, scarf, or babywear? Lightweight is the way to go.
How to Choose the Right GSM for Your Project
Here are a few common projects and recommended fabric weights:
| Project Type | Ideal GSM Range | Suggested Fabric Types |
|---|---|---|
| Summer Dress | 100–150 GSM | Cotton lawn, viscose, rayon |
| Trousers | 200–300 GSM | Twill, denim, ponte |
| Cushion Covers | 250–400 GSM | Canvas, jacquard, upholstery fabrics |
| Blouses or Shirts | 70–150 GSM | Voile, poplin, crepe |
| Coats or Jackets | 300+ GSM | Wool coating, melton, boucle |
You’ll find the GSM listed on all most of our product pages at CheapFabrics.co.uk, so you can shop with confidence.
Final Tip: Feel + Function = Fabric Success
If you're ever in doubt, ask yourself:
"What do I want this fabric to
do?" Should it float, stretch, hold its shape, or keep you warm? The answer will often point you to the right weight.
And remember—if you’re shopping on a budget (or just love a great deal), CheapFabrics.co.uk offers high-quality textiles with transparent GSM info, so you never have to guess.
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Check out our full range of fabrics here
GSM of each fabric is listed on the product description, if you are unsure then feel free to contact us.
