Fokke de Jong always found the traditional business suit boring. So while he was studying law at the University of Amsterdam in 2000, he began designing his own suits in his dorm room and selling them out of the trunk of his car. He named the company Suitsupply and after a few years selling online, opened his first store in Antwerp in 2007. De Jong made the jump across the pond in 2011 and at first, the American menswear industry didn’t pay much attention. That was until this Dutch upstart with his European aesthetic, lively and colorful stores and eye-popping marketing campaigns began to chisel away at their market share. Today, Suitsupply operates more than 110 stores globally and 38 in the U.S., with more to come. Suits continue to represent the bulk of the business, which is now over $1 billion in sales, but elevated casualwear is also drawing fans.…