Please see pictures for best description, I am happy to answer any questions the best I can. From a smoke free home

Measure approximately 4 1/2" wide and 4" high and has an American Flag, Earth, The Challenger Shuttle and crew names: "McNair, Onizuka, Resnik, Scobee, Smith, McAuliffe, Jarvis. "The backs have a removable solid off white backing.