80pt is 28mm using online calculator...28mm is 1.1 inches so I am completely confused, can you help me out?

Confusingly, a "point" has more than one meaning. In typography a point is 1/72 of an inch, but in this context it means the same as a "mil" = 1/1000 of an inch. Hence 100 points = 1/10 of an inch, and 80 points is 0.08 inch, which is slightly less than 1/12 of an inch. In metric terms 80 points is 2 millimeters. (Here's the math: 1 inch is by definition exactly 25.4 millimeters and 0.08 x 25.4= 2.032 mm.)

Are these good t make journal cover and punch holes in for the spring?

They'll make a thick one-- they're nice and solid but you'll need a pretty hefty punch for it, so if your punch can't handle a good chunk of paper at a time maybe choose a lighter weight?

How difficult is it to cut these? With scissors or exacto knife? Or small tooth saw? Thanks

Not bad with a good utility knife. Needs more than one pass but a lot easier than 100pt chipboard. I have a Carl cutter and it cuts it with a couple passes whereas 100pt takes me like 10 passes with a good utility knife.

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20 Pcs Book Board, Binders Board Chipboard Designer Bookboard Kraft Heavy Duty Chipboard Sheets Bookbinding Supplies for Book Binding Cover (Gray, 12.5 x 10 Inch 22PT)

Product ID: 524505500

📏12.5 x 10 inch perfect size

📦20 pcs bulk supply

🛡️22PT heavy-duty thickness

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Description

📚 Elevate your craft game with heavyweight durability and style!

BULK PACK ADVANTAGE - 20 high-quality sheets to fuel your creativity or share with your team
SMOOTH SAFE FINISH - No sharp edges or burs—professional-grade finish for flawless handling
MULTI PURPOSE MASTERY - Perfect for bookbinding, box making, and all your DIY craft ambitions
DURABLE 22 PT THICKNESS - Robust 0.5mm chipboard that withstands heavy use without bending or breaking
PRECISION CRAFTED DIMENSIONS - Ideal 12.5 x 10 inch size for versatile projects and easy portability

This 20-piece set of 22PT kraft chipboard sheets measures 12.5 x 10 inches each, offering a sturdy, smooth, and lightweight solution for bookbinding, crafting, and packaging. Designed for professionals and creatives alike, these durable boards resist bending and wear, ensuring your projects stay pristine and polished.

Specifications

ASIN	B0BX9YJ7HK
Batteries required	No
Best Sellers Rank	#1,831 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #1 in Scrapbooking Chipboard
Customer Reviews	4.4 4.4 out of 5 stars (1,353)
Item Weight	1.29 pounds
Item model number	OB-230302-A
Manufacturer	Lewtemi
Product Dimensions	12.5 x 10 x 0.02 inches

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S$34

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