Learning what proper portion size for each food is a useful tool in nutrition. It is an understandable way to approach eating the right amount. Often times we do not have scales for weighing out food, measuring cups or other tools at our disposal to help us measure the suggested portion size. Most people do not or will not take the time to measure with such accuracy anyway. Therefore, understanding these simple ways of knowing how much of each food to eat and how the portions relate to each other can take you a long way towards eating the right amount of food.