While doing spring cleaning back in March, I came across two of the exact same shirts in Mrblocko's t-shirt drawer. There is a long story about why he has two of these shirts. The Reader's Digest version is that there was a mix up by the post office, and the shirt got lost so a second one was ordered. Of course after the second one arrived, the first one mysteriously showed up.
I think this shirt is the coolest ever, because c'mon it's Dumbledore's Army. So Mrblocko let me have his spare shirt.
The shirt was like a tent on me. Yikes! Look at that armhole!
I found this tutorial on how to transform a large t-shirt into a fitted one over at a.steed's.life.