Did you know that McDonald's doesn't serve the same size portions of fries around the world? For example, a medium-sized Japanese fry has 454 calories, while a British one has "only" 337. The same applies to other fast food chains, such as KFC and Subway, where the same portions vary considerably. The same KFC hamburger in Canada is, for example, 35 grams heavier than its Australian "twin brother", and it also has 122 more calories. Check out other interesting comparisons of fast food portion sizes around the world.