For a main course serving, I like to plan on 3 to 4 ounces of dried pasta per person. Often, the package will offer nutritional info for a 2- or 3-ounce amount, but I think that is more likely to be the right portion for a first course or a side dish. Also, I live with a hungry husband and two hungry grown boys, so I like to be realistic! (And even then, they often have seconds).