The serving size tells you the size of each serving. It could be an number or a common measurement. For example, one serving of chicken noodle soup is 1/2 cup. Sometimes this information can be very misleading. If a package contains six cookies, but the serving size is two cookies, then the package contains three servings, not just one. So if you eat all six cookies, you are eating three servings.
On the chicken noodle soup example above, it is important to note that a serving is one-half cup of the condensed soup as it comes in the can and not one-half cup of the soup after it has been mixed with water. Always look to see if the serving size should be measured or counted before the product is prepared or after.
Sometimes the number of servings may be easier to understand than serving size. On the chicken noodle soup Nutrition Facts label, the number of servings is given as about 2.5. That means if you prepare the can of soup with any amount of water and eat the whole thing yourself, you have eaten two and one-half servings (and that doesn't include any crackers).
