What I have been doing is sneding a cut-sheet (8 pages – 8.5×11) that I have printed on 11×17 and folded as a “portfolio” I can leave or send in the mail. I has smaller pictures and text description, only one project per page. Then I have an 11×17 portfolio with no more than two facing pages per project. I like the 11×17 size because you can really see the detail in a site plan, and the photos can be larger. Any smaller wirth a large site plan and detail becomes illegible. I also carry along 11×17’s of complete projects, from the concept through construction documents. I leave it to the interviewer if they are interested in seeing a project in more detail. It is a lot to carry, but I am prepared for any type of firm and am totally flexible.