Understanding GSM in Printing Paper: A Guide for Choosing the Right Paper Weight
When choosing paper for printing—whether it’s for art prints or everyday office documents—you’ll often come across the term GSM. But what exactly does it mean, and how does it affect your final print product?
What is GSM?
GSM stands for Grams per Square Meter. It measures the weight of paper and gives a clear idea of its thickness and sturdiness. Contrary to what some may think, GSM is not a direct measure of paper thickness, but heavier paper usually feels thicker and more substantial.
For example, if a paper has a GSM of 80, it means a single sheet measuring one square meter weighs 80 grams. A higher GSM generally indicates a thicker, denser paper.
Why GSM Matters
The GSM of a paper affects Durability: Heavier GSM papers are more resistant to tearing and handling.
Opacity: Higher GSM means less chance of ink showing through to the other side.
Print Quality: Thick papers tend to hold ink or toner better, reducing smudging or warping.
Feel & Perception: Heavier paper feels more luxurious and professional, making it ideal for premium products.
Common GSM Ranges and Their Uses
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60–90 GSM Lightweight paper Everyday printing, notepads, copier paper
- 90–120 GSM Standard office paper Letterheads, reports, flyers
- 120–170 GSM Medium-weight paper Brochures, posters, quality flyers
- 170–250 GSM Heavy paper / light card Book covers, premium posters, menus
- 250–400 GSM Cardstock Business cards, postcards, invitations
- 400+ GSM Extra-heavy stock Specialty packaging, museaum quality canvas art
Choosing the Right GSM for Your Print Project
- Purpose: Is it for internal office use or customer-facing material?
- Durability Needs: Will it be handled frequently or mailed?
- Impression: Do you want a premium, substantial feel?
- Printer Compatibility: Not all printers handle high GSM papers well.
GSM vs. Paper Thickness
While GSM measures weight, caliper (usually in microns or mils) measures thickness. Two papers with the same GSM can feel different if made from different materials. For example, cotton paper may feel thicker than wood pulp paper of the same GSM.
Understanding GSM helps you select the perfect paper for your print needs—balancing quality, durability, and cost. Whether you're printing bulk flyers or limited-edition art prints, the right GSM can enhance both the presentation and perception of your work.