Enjoy the next football game with PMU Challenge Flag / Penalty Flag. These flags let you feel like you re right there on the field! Challenge Flag. Do you dislike those bad calls the referees make? Well now you can get ready to challenge them with the challenge flag! It is made with nylon fabric and measures 9 Inch. Now you are ready to challenge the opponent in the party games. Penalty Flag. Make penalty calls of your own with this penalty flag! Whether it s in reference to a game or you make up your own game with your friends it is sure to be a fun time!.