Look for the new design. The FDA and USDA considered the health issues of greatest concern to the general public, and identified nutrients that must appear on the label and those that are optional. The required information is shown on the sample label. In the past, serving size could be determined by the manufacturer. The serving size of products that come in units, such as cookies, candy bars and sliced products, is the number of whole units that comes closest to the reference amount.
Cookies are an example.
Certain rules apply to food products that are packaged and sold individually. Many beverages fall into this category. If the individual package is less than 2 times this reference amount, the item can be called one serving. If a product has a reference amount of 100 g or 100 ml or more, and if the package contains more than one and one-half times but less than two times the reference amount, manufacturers have the option of deciding whether the product will be labeled as one or two servings. Remember that this is one serving of one food to fit into the total day's eating.