I love this idea...I have soo many tshirts from college that I don't wear anymore. I don't take credit for creating the pattern, but it's so cute I had to pass it on! My green SWU shirt had the perfect patern on it, they almost look like they were made to be pants instead of a shirt!
I got the patern from Cut Out & Keep's Blog, the instructions are really easy. Just a few cuts & a few seams & you're done! No measureing either, which is a major plus for me! :P
Just click the link above to see the patern & get sewing!!