Paper Weight & Thickness: A Practical Guide for Print Designers

Paper Weight & Thickness: What Every Designer Should Know Before Sending to Print

One of the most common pitfalls in print production is misunderstanding paper weight and thickness. Picking the wrong stock can ruin an otherwise flawless design — your business card feels flimsy, your brochure loses its premium hand-feel, or your book bleeds text through the page. Let's demystify how paper weight works so you never make that mistake again.

There are two dominant systems for measuring paper. The GSM (grams per square meter) system, used globally, measures the weight of one square meter of paper. A standard copy paper is 80–100 GSM, while premium business cards sit around 350–400 GSM. The other system is points (pt) and pounds (lb), common in North America. Points measure physical thickness directly — 1 pt = 0.001 inch. A 14 pt card stock is noticeably thicker than a 10 pt. The key confusion? Two papers with the same GSM can have different thickness if one is coated and the other isn't. Coated papers are denser, so a 300 GSM coated stock is thinner than a 300 GSM uncoated stock. Always specify both weight and finish when ordering.

So what should you choose for your project? Flyers and leaflets work well at 130–170 GSM — sturdy enough to feel substantial, light enough to keep postage low. Business cards demand 300–400 GSM or 12–16 pt; anything less will feel cheap in the hand. Brochures and catalogs shine at 170–250 GSM for pages with a 250–350 GSM cover. For book interiors, 80–100 GSM is standard, though art and photography books often use 150–200 GSM to prevent show-through. Your choice also affects folding, binding, and finishing — heavier stocks require scored folds to avoid cracking, and some perfect binders have maximum thickness limits. If you are working on a custom print job, it is always worth consulting your printer's specifications before finalizing the design. For more detailed guidance on selecting the right materials for your project, visit for comprehensive printing knowledge and technical references.