Referees are known for various things depending on the sport. They are needed to spot a 'Foul Ball', to hand out a red card, or to call a penalty. Although they are generally unpopular amongst sports fans, they're still important to the game. If you have been elected to play referee, you can't go wrong with this Referee Shirt costume. Add it to some black slacks, and you'll be ready to make some tough calls.