The United States has long been known for its extra-large food portions. We've got king-size candy bars and family-size chip bags and all-you-can-eat buffets. Many restaurants put calorie counts on their menus that can serve as a PSA for diners that they really ought to take half of their meal to go. More recently, however, food has started to move in the opposite direction. Portions are getting smaller amid tighter consumer budgets, the growing prevalence of weight-loss drugs, and perhaps some corporate tomfoolery, Business Insider's Emily Stewart writes. The shift is good in that if you're trying to save money or watch your waistline, you have more options. But this isn't a case of corporate altruism in the grocery aisle: Brands' bottom lines often get a boost from offering the smaller stuff, too. Read more about how businesses are making huge money by offering people smaller portion sizes at the link in our bio. Story by Emily Stewart (Credit: Getty Images; Rebecca Zisser/Busin...