126 film was also called Kodak Instamatic, as I recall. It was packaged in a plastic cartridge. The stock was about the same width as 35mm without the perfs, and made a square negative. 127 was a paper backed roll film much like 120, but narrower. It used to make what were called Super Slides about 2" square or a little less. As far as I know both are obsolete and no longer made.(posted 9180 days ago)