Ok I have looked this up a million times but I just want to be sure since I will be flying alone out of Reagan National and have never been there before but for you carry on items with Airtran has anyone ever taken the adidas duffel? I mean the big ones that you can personalize I am pretty sure that they count but I was checking the deminsions and mine looks bigger than the ones on the website and I do not know the exact measurements. Thanks!