You don't need to watch Jeopardy every night to know that you start off with a white collared button down shirt and a pair of black dress shoes to become Raymond.
Then you'll need a single breasted taupe suit with slightly flared lapel.
To top it all off you have to get boxer shorts from Kmart. It has to be boxers from Kmart because underwear is not just underwear.
Now you just need to have a gift for calculating figures and be extremely particular and peculiar.
Looking for a group costume? Find a friend to play Charlie Babbitt.