You need to enforce servings. No one needs more than 4oz of a protein and then 2 sides at a meal. This is why Americans have a massive obesity problem.

I would be famished if that's all I ate and Im a average sized middle aged female (5'4, 115 pounds). I have always eaten relatively large quantities of food and am the same size I was in HS.

My sister fed her kid small portions and she ended up with a 6'4 120 pound teen who looked like he had lived through a famine. She thought he didnt need food because she, personally, doesnt get hungry..

There is no exact amount of food that is right for everyone.