And then there is non perforated 35mm paper backed roll film which is 828: Kodak decided to give it a single perforation and put it into plastic cartridges and voila! ::: 126. Kodak 110 has to be a recycled number. My 1904 stereo Brownie No.2 takes 116 film which is 4 inches wide. It's all marketing done by focus groups for groups who like to focus.