the impossible shirt

okay...so i have a girlie question. more accurately, a fashion question. i have a new addition to my wardrobe and it has all my colours, is soft & cozy, and long (midthigh-length t-shirt tunic). one problem...i have NO frickin' clue what or how to wear it and not look wide or short or lumpy. a few weeks ago someone did a call & response blog for a fashion quandary similar to mine.
i am sending the same quandary out there to y'all...help me figure out how to wear this impossibly comfortable shirt!