Filet Mignon is also known as a Beef Tenderloin because it comes from the loin and it's the most TENDER muscle in the whole animal. Getting a whole filet mignon trimmed and tied as a roast is guaranteed to win you points with your loved ones. Perfect for the holidays or just a special family dinner, filet mignon is pretty much the King of Roasts. Get a 5 lb filet for 6-7 people, a 6 lb filet for 8-9 people and a 7 lb filet for 9-10 people. Obviously this depends on how hungry everyone is and what else you are serving. (Please note that Filet Mignon Roasts are billed Gross Weight meaning that we weigh up the piece before we trim and tie it for you.