1. Wrap a mens button down around you like a towl.
2. Button it from the bottom up, to where it fits right.
3. Take the sleaves and use them to secure the shirt around you in a bow.
THE BIGGEST TIP:
A lot of girls have tried this and it didnt work because the shirt wasnt big enough. You probably wont be able to use on of your own botton downs- i think it has to be a dads or boyfriends or older brothers