What size Adidas football(soccer) jersey should i buy? I'm 6'3" tall and 140 pounds (tall and thin)?

I'm 6'3" and 140 pounds, so i'm tall and thin, and i'm going to buy an Adidas football(soccer) jersey, should i buy a large or a medium? I've heard that Adidas runs slightly large, but i'm still not sure which size to get. Does it correspond to regular shirt size? Any help would be appreciated.