– “Caliper” refers to the thickness of a paper in thousandths of an inch. To be approved to ship via USPS, your paper must be at least 3.5 inches high x 5 inches long x 0.007 inches thick. Your paper cannot be more than 4.25 inches high x 6 inches long x 0.016 inches thick.
Accordingly, how thick is normal A4 paper?
Letterheads, compliments slips and A3 property detail sheets
All printed on quality 120gsm uncoated paper, the letterheads are A4 (210 x 297 mm), the property detail sheets are A3 (297 x 420 mm) and the compliment slips are DL (210 x 99 mm).
Also to know is, what is A4 thick paper? Heavyweight A4 Cardstock by Desktop Publishing Supplies, Inc. is made to the EXACT A4 size of 210mm x 297mm (8.3″ x 11.7″). This stock is made from a quality 80lb cover bright white cardstock (216 gsm). Our A4 Cardstock works on Inkjet and laser printers (including copiers and fax machines).