A federal judge has ruled that Burger King must defend itself in a class action lawsuit alleging false advertising related to the size of its Whopper sandwiches. The lawsuit claims that Burger King's promotional images depict the Whopper as approximately 35% larger and meatier than the actual product customers receive. The judge denied Burger King's motion to dismiss the case, allowing the suit to proceed in court. The plaintiffs argue that the advertisements mislead consumers by making the burgers appear bigger than they are in reality. This ruling requires Burger King to respond to these allegations and defend its advertising practices.