Newbie ? #2: How big should outlines be made?

like the title says: How big should outlines be made? I just got (or rather found spontaneously on a book shelf at my parents house) an Anniversary text book. On page 2 the book claims that "the size of the characters given in this manual will be a safe standard to adopt," but man those are small outlines. My mother is the only flesh-and-blood person I know who knows anything about Gregg and she also thinks the outlines in the text are on the small side (which her old DJS taxtbook seems to confirm).    Help me out here guys. How big should outlines be written? From Gregg teaching or just common practice. Thanks again       

(by -strawman- for everyone)