Quote Originally Posted by Thomas Bertilsson View Post
Same goes for 11x14, where if you take 1" border around the print area, you end up with a 9x12" print, also perfect 3:4 ratio.
Modeling industry uses 9x12 as its standard for photographs. The legend has it, it came from the fact fashion shoots were often done with 645. perhaps this is the reason. I use this 9x12 with 1" border all the time as it meets my vision quite well.

Actually, 645 and 6x7 (and 6x8) works quite well to print on 8x10 and 11x14 with very little cropping. Keep in mind, the film opening on most neg carriers (on enlargers) do crop a bit, so you'll have to take that into consideration as well as minor framing errors when shooting.