Cadet 13/15 or 11 advice

Hi everyone

Has anyone used a 13/15 cadet with an 11-inch macbook air? I am thinking I might want the larger cadet so it gives me room to carry papers and books with my computer, but wanted to hear opinions from you all. I am switching from a Nomad wise walker now that I have a smaller and so much lighter computer.

Thanks!!!

Even the 13/15 cadet is a small bag. I'd go with the larger one, but if you were intent on a smaller one, I'd get a Co-Pilot.