I made the hat out of an empty Sparks can. I used water and flour for paper mache over the can and attached a small round piece of cardboard to the bottom. Then I painted it and attached white speaker wire to it so I could tie the hat on behind my ears and it would blend in with the white make-up.
For the shirt, I pinned red balls down the front and used a roll of the iron on tape to attach the stripes to my arms. It’s not exact from the movie but it’s pretty good.