From The Art and Popular Culture Encyclopedia
The Academy of Motion Picture Arts and Sciences,[1] the American Film Institute,[2] and the British Film Institute[3] all define a feature as a film with a running time of 40 minutes or longer. The "Centre national de la cinématographie" in France defines it as a 35mm film which is longer than 1,600 metres, which comes out to exactly 58 minutes and 29 seconds for sound films, and the Screen Actors Guild gives a minimum running time of 80 minutes.[4] Usually a feature film is between 90 and 210 minutes; a children's film is usually between 60 and 120 minutes[citation needed]. An anthology film is a fixed sequence of short subjects with a common theme, combined into a feature film.
[1] [May 2007]