1 piece is between 0.75 lb. and 1.25 lbs. he pork tenderloin is the leanest and most tender cut of pork! Pork tenderloins are cut from the loin section of the whole bone-in pork loin. They are excellent marinated for the grill or roasted in the oven. On average, 1 pork tenderloin will serve 2 people.