I really could Jorge lol Leggings and that shirt would work too...
It is so big. I did call Gamestop.com and they were very nice. We both had a laugh about the sizing. He checked around, put me on hold and tried to find a small/medium. But they had none left. Oh well, it's a nice tshirt, I will wear it around the house.

If you have a sewing machine you could probably change it a little here and there and make a nice dress/thing. Get creative 
Is there a photo of the t-shirt somewhere? what does the print look like?
I can take a pic of it if you haven't seen it yet.
It's really cool, has a picture of Gabriel's combat cross, all in black and a Konami tag in red on the sleeve. It says Castlevania Lords of Shadow on it and has the facebook address.