This is before, and you can see how, erm, lovely it is.
The way I did this was by cutting the dark blue fabric at the top and adding about an inch of white-ish fabric in there. I serged it on the outside too, and that kinda matches the original design of the shirt.
I also have some other shirts I got that I don't quite know what to do with. I mean, I could make 'em into tank tops, camis, or just resize them. Any suggestions?