One of the first and most important lessons I learned about weight control was Portion Size. Until I understood portion and serving size, I had no idea how to control my weight. I thought a serving of pasta was a heaping plate full. As you can see from the illustration, that is a far cry from accurate. Once you get a handle on how much food is a correct portion, you will be on your way to controlling your weight.
An example of portion size and serving size is the old bag of chips example. You pick up a bag of potato chips. Because you are paying attention to your weight, you check the calories on the back. It says something like 150 calories per serving. Not bad … but wait
weight. A serving is one ounce. The bag weighs three ounces. So, you need to limit yourself to a third of the chips. Use a food scale, or your eye, or count them out, but if you eat the whole bag, you will consume 450 calories, not the 150 serving size. That’s how you combine serving size and portion size.