FILM STANDARDS AND SIZES
I have been trying to bring together a database of all the info I can glean on film dimensions. Here is a first cut, plus some of my source material. If anyone can help to correct, amend, fill in or expand the table (with source material), I would be most grateful.

I have tried to do this in full size above, but the normal expandable thumbnail is below.
The penultimate pic is the 16/9.5/8 film area comparison Pathescope were so fond of. Adding the 8mm info from the last pic, we see that the Std8 figure of 47% of total area of film projected is much lower than the 55.25 figure in the Pathescope comparison. Super 8 comes in at 63% - almost the same as 16mm, and 9.5 sound is not given at all. The projected picture for 9.5 sound is 7mm x 5.5 (38.5), total area per frame is 7.54 x 9.5mm (71.63). I make that 53.75%.
On a slightly different tack, this seems to belong here, too.