Walk into a restaurant in different parts of the world, and you'll quickly realize that "normal" portion sizes vary wildly. What seems like a feast in Tokyo might look like an appetizer in Texas.

Over the past few decades, portion sizes at restaurants and in packaged foods have ballooned to shocking levels. What used to be a modest meal is now often enough to feed two or even three people.

Add Yahoo as a preferred source to see more of our stories on Google. Healthy portion sizes are based on a 2,000 calorie diet, "but of course everybody needs different amounts of calories," Burak says ...

Not many people cook or eat meals and snacks served in perfectly measured and weighed portion sizes. Even foods that come in packages mention serving sizes that are difficult to understand. How many ...

Many people assume some personal failing when they find it challenging to stick to a healthy diet. What we often forget, however, is that some of the most easily available, affordable foods are made ...