I'm in a perpetual argument with more than one person over the appropriate length of a resume. I've always believed in the 1-page resume. Most on the other side see 3-pages as a logical limit. They are wrong, of course. The 1-page resume is the perfect size. You never need more than one page explaining who you are. If you think you do, you are overthinking yourself. The resume is not supposed to be a novel about your life, it's supposed to be a book report about the novel about your life. It gets the reader interested in the story, but it doesn't tell you everything or give away the ending.