Weird question. This is a t-shirt submission from a contest I have been following.
The dragon's head looks soooo familiar but I can think of where. Is it lifted from a Paizo product or am I just crazy? (I don't think it is because this submitter is a great artist but I just got to know for sure.)
It looks very similar to the red dragon on the cover of the 3.5 monstrous manual. Not quite, but really close.