When Mark S. Conroy packs for an airline trip, which suitcase he uses depends on which airline he is flying.
Most airlines now limit the size of carry-on luggage.
But each has its own standard. So Conroy, the president of Ft. He has a slightly narrower bag for American Airlines. And he's got a third, expandable bag if he's flying overseas on British Airways or on Continental Airlines, neither of which limits carry-on size. Welcome to the world of airline luggage.