What is GSM? A Quick Guide to Paper Weight for Packaging

When you’re choosing custom packaging, you might see the term GSM pop up here and there. GSM stands for grams per square meter — it’s a measurement of how much a sheet of paper weighs, which directly affects how thick, sturdy, and opaque it feels.

But here’s the thing: GSM is not the only factor that determines how your packaging looks and performs. The type of material, coatings, and even the intended use all matter just as much. At Fusenpack, we select the paper weight and finish for each product based on its function — so you get packaging that not only looks great but works perfectly in real-world conditions.

What Is GSM and Why It Matters in Packaging

Think of GSM as the “weight class” of your paper. A higher GSM number usually means thicker and denser paper, which tends to be more durable. Lower GSM means the paper is lighter and more flexible.

• Low GSM (below 50gsm) – Thin and lightweight, ideal for wrapping or layering without adding bulk.
• Medium GSM (50–100gsm) – Versatile, balancing strength with flexibility, often used for paper bags or protective wraps.
• High GSM (above 100gsm) – Sturdy and substantial, suitable for premium bags, covers, or products that need extra structure.

However, GSM alone doesn’t tell the full story — a coated 50gsm greaseproof sheet can be more functional for wrapping oily food than a plain 80gsm sheet. That’s why our product selection is based on material + weight + intended use.

How Material and Coating Affect Performance

Two papers with the same GSM can feel and behave very differently. Factors like fiber type, surface finish, and special coatings can completely change the experience.

• Fiber type – Virgin wood pulp offers a cleaner, smoother surface compared to recycled paper.
• Coatings – PE (polyethylene) coatings create moisture and grease resistance for food packaging.
• Surface texture – Kraft paper has a natural, rustic look, while smooth finishes give a premium touch.

At Fusenpack, we combine these elements to match the unique needs of every product category — whether it’s preventing grease stains, supporting heavy contents, or showcasing a custom print.

Fusenpack Product Examples and Their Paper Characteristics

At Fusenpack, we use different types of paper to match the needs of various products — not because we offer GSM choices, but because every design requires the right balance of thickness, durability, and feel.

For instance, our custom deli paper is made from lightweight 36g greaseproof paper, which keeps food fresh while allowing it to fold easily around wraps and sandwiches. In contrast, our custom paper bags are crafted from premium 100–120g kraft paper — thick enough to hold heavier items without tearing. Somewhere in between, you’ll find our custom 2-ply beverage napkins, made with virgin wood pulp for a soft yet sturdy touch.

Even specialty items like our 50g PE-coated greaseproof paper bring unique qualities to the table — perfect for oily or saucy foods where extra resistance is a must.

Why We Don’t List GSM Options

Since GSM is just one piece of the puzzle, we’ve already done the work of choosing the best weight and material combination for each product’s intended purpose. This means you don’t need to worry about whether to pick 70gsm or 80gsm — you simply choose the product type, and we ensure it performs exactly as it should.

If you need a specific GSM for a specialized application, our team can discuss customization options to meet your requirements.

Conclusion

Understanding GSM helps you appreciate why certain packaging feels sturdier or more flexible, but it’s not the only factor that matters. The right paper for your brand depends on weight, material, finish, and the job it needs to do.

At Fusenpack, every product — from deli paper to premium paper bags — is designed with a balance of aesthetics, performance, and practicality. You focus on your brand; we’ll make sure your packaging delivers.