Joined: 26 Apr 2004 Posts: 4650 Location: Raleigh, NC, USA
A standard sheet of computer output paper is 11 x 13 7/8 inches. That's 11 inches from perf-to-perf, and 13 7/8 inches wide, including the tractor feeds.
An IBM-3211 impact printer uses a 10-pitch (10 CPI) print mechanism, much like a typewtriter. Given that you typically would want to remove the tractor feeds, which would take away about a half-inch of the paper's width, that would leave you with about 13.2 inches of printable surface. So, if you wish to completely fill the page from edge-to-edge, 132 10-pitch characters is just the right amount needed.