I have divided this recipe in half for a 3-4 pound roast but, as written here, this delicious pot roast serves 15-20 people. Perfect because it's best when made 1-2 days before serving. It will pick up additional flavor from sitting in its braising juices, will slice more neatly because the meat fibers will have compacted as they cool and will hold together nicely when reheated. Great tasting pot roast for 6 or 20. Prep and cook times include reheating.