The Facebook profile of founder Mark Zuckerberg on a mobile phone is seen in this photo illustration taken in Lavigny May 16, 2012. Facebook Inc increased the size of its initial public offering by almost 25 percent, and could raise as much as $16 billion as strong investor demand for a share of the No.1 social network trumps debate about its long-term potential to make money. Facebook, founded eight years ago by Mark Zuckerberg in a Harvard dorm room, said on Wednesday it will add about 84 million shares to its IPO, floating about 421 million shares in an offering expected to be priced on Thursday. REUTERS/Valentin Flauraud (SWITZERLAND - Tags: BUSINESS SCIENCE TECHNOLOGY SOCIETY) - RTR325NZ