The shirt of question???

So I have a shirt... at my apartment.. that could be 1 of 2 of the dates.. and I have no idea which one it is.. now this presents quite the delimea because to ask if this is your shirt begs the question who else's shirt would it be.. or if it is then why would you be asking you know it's mine. So instead of the direct asking approach I've left it sitting at the end of my bed on my seating area and hope that the owner comes to claim it.