Paper Stock Explained: 14pt vs 16pt vs 32pt (and What lb Means)

You're about to order business cards or postcards, and the product page asks you to choose between 14pt, 16pt, 18pt or 32pt. Another page talks about "100lb gloss cover." Is 100lb thicker than 16pt? Is 32pt twice as nice as 16pt? Printers throw these terms around as if everyone knows them, and most people just guess and hope the box that arrives feels right.

This guide explains what "pt" and "lb" actually measure, why the two numbers can't be compared directly, and which thickness makes sense for the most common jobs: business cards, postcards, direct mail, flyers and menus.

What "pt" means: thickness you can measure

Points (pt) measure caliper, which is the physical thickness of the sheet. In the US, one point equals one thousandth of an inch. So a 10pt card is 0.010" thick and a 16pt card is 0.016" thick (Card stock, Wikipedia).

That makes pt the easiest number to understand: bigger number, thicker card. A few practical reference points:

• 14pt – a solid, economical card stock. It feels like a real card, not paper, and works well for high-volume postcards and handouts.
• 16pt – the everyday standard for business cards and postcards. Stiff enough to feel professional without costing a premium.
• 18pt – a step thicker than 16pt. On KEOPSY's 18pt Postcards, one side is left uncoated so you can write on the back with a regular pen.
• 32pt – ultra-thick. It's the stock behind our Painted-Edge Postcards, where the thickness is part of the design because the colored edge needs room to show.

Keep in mind that coatings and laminates add thickness too. For example, our Suede Business Cards start as 16pt C2S (coated two sides) stock and get a soft velvet laminate on each side, bringing the finished card to 19pt total. When a spec lists both a base stock and a total thickness, the total is what your hand will feel.

What "lb" means: weight, not thickness

Pounds (lb) describe basis weight: how much 500 sheets of that paper weigh at its "basic" uncut sheet size. The catch is that the basic size changes depending on the paper category (Grammage, Wikipedia):

• Bond / writing (office paper): basic sheet 17" × 22"
• Text / book (flyers, letterheads, brochures): basic sheet 25" × 38"
• Cover (postcards, cards, folders): basic sheet 20" × 26"

Because the reference sheets are different sizes, the pound numbers only make sense within the same category. That's why 100lb text and 100lb cover are completely different papers. 100lb text is a heavy, quality flyer paper that still folds easily. 100lb cover is a card stock. Same number, very different feel.

This also explains the classic confusion Wikipedia points out: a 65# card stock is thicker and heavier than an 80# newsprint sheet, even though 80 is the bigger number (source).

So how do pt and lb compare?

There's no exact formula that converts pounds into points, because two papers with the same basis weight can have different thickness depending on the fibers, the coating and how tightly the sheet is pressed. Treat any "conversion chart" you find online as a rough guide only.

What you can rely on:

• When comparing card stocks, compare pt to pt. That number is a direct thickness measurement.
• When comparing flyer or letterhead papers, compare lb to lb within the same category (text vs. text, cover vs. cover).
• If a product lists a comparison, trust it. For instance, KEOPSY's synthetic EndurACE stock is 10pt but is described as having the feel and body of our 100lb paper stock, because synthetic material behaves differently from paper.

When in doubt, ask your printer for the caliper in points. It's the one number that tells you exactly how thick the finished piece will be.

Which thickness should you choose? A job-by-job guide

Business cards

16pt is the safe default for most professionals: realtors, contractors, consultants and retail. It holds up in wallets and doesn't bend when handed over. Go thicker (or add a soft-touch laminate) when the card itself is part of your brand promise, such as luxury real estate, interior design or a high-end salon. If your cards live in trucks, kitchens or outdoors, a waterproof synthetic stock will outlast any paper thickness.

Postcards and direct mail

This is where thickness has real consequences beyond feel. The USPS only allows postcard pricing for cards that are between 0.007" and 0.016" thick, and between 3.5" × 5" and 4.25" × 6" in size (USPS Domestic Mail Manual 101). In points, that's 7pt to 16pt.

So a 4" × 6" card on 14pt or 16pt stock fits within the postcard limits, while an 18pt or 32pt card is over the thickness limit and won't qualify for postcard pricing, even if the size is right. Larger formats like 6" × 9" or 6" × 11" are outside postcard dimensions anyway. Always confirm current postage rules with USPS or your mailing provider before a big send.

For postcards you hand out, leave on counters or insert into packages, postage doesn't matter, so choose on feel and budget.

Flyers and brochures

Flyers are usually printed on text weight paper, not card stock. 100lb text is a popular choice: sturdy enough to feel premium but thin enough to fold cleanly into a tri-fold or bi-fold. If you want a flyer that stands up on its own or survives being passed around a trade show, step up to a cover stock and skip folding, or ask about scoring before folding.

Menus and anything that gets handled a lot

Thickness alone won't save a menu from spills. For menus, table cards and anything used near food, water or outdoors, look at waterproof synthetic or plastic stocks rather than simply choosing the thickest paper.

Cards people need to write on

Appointment cards, thank-you cards and loyalty cards need a writable surface. Heavy gloss or UV coatings can make ink smear. Choose an uncoated side (like the back of an 18pt postcard) or an uncoated stock for these.

Quick comparison table

Checklist before you order

• Is the stock listed in pt (thickness) or lb (basis weight)? Don't compare one against the other.
• If it's in lb, is it text or cover?
• Will it be mailed? Check that thickness and size fit the postage rate you're budgeting for.
• Will it be folded? Text weights fold cleanly; cover stocks may need scoring.
• Does anyone need to write on it? Choose an uncoated side.
• Will it face water, food or weather? Consider synthetic or plastic instead of thicker paper.
• Does the spec include coatings or laminates? Check the total thickness.

Frequently asked questions

Is 16pt or 14pt better for business cards?

Both work. 16pt is the more common choice for business cards because it feels noticeably stiffer in hand. 14pt is a good option when you're ordering large quantities or handing cards out at events where cost per card matters more than feel.

Is 100lb paper the same as 16pt?

No. "100lb" is a basis weight and depends on whether it's text or cover paper, while "16pt" is a direct thickness measurement of 0.016". 100lb text is much thinner than a 16pt card. Compare thickness in points whenever you can.

Can I mail a 32pt postcard?

You can mail it, but it won't qualify for postcard pricing. USPS postcard rates require a thickness of no more than 0.016" (16pt), so a thicker card is priced as a letter or larger. Save ultra-thick stocks for handouts, packaging inserts and in-person impressions.

Print with a real person checking your file

Choosing the right stock is half the job; the other half is making sure your file prints the way you expect. At KEOPSY, a real person reviews every file before it prints, so issues like missing bleed, low-resolution images or text too close to the edge are caught before your order goes to press, not after it arrives.

Don't have a design yet? Start in our AI Design Studio to create a print-ready layout, then pick the stock that fits your job, whether that's a standard 16pt postcard or a premium suede business card.