Roasts range from 3lbs to 8lbs. We cannot control the weight of each roast. A boneless rib roast loses approximately 15% of its weight during cooking. For a standard 3 course dinner, the protein (or entree) should be 6 oz. – 8 oz. per person depending on appetite. Example: a 5lb. boneless rib roast will lose approximately .75lb (15%) during the cooking process (AT MEDIUM RARE) leaving a 4.25lb Roast (68 ounces.) At 7 ounces of roast per person, a 4.25lb. roast (68 ounces) will feed nearly 9-11 people.