16 mm film is a popular, economical gauge of film. 16 mm is the width of the film. Other common film gauges include 8 mm and 35 mm. It is generally used for non-theatrical (e.g., industrial, educational) film making or for low budget motion pictures. It also existed as a popular amateur or home movie making format for several decades, alongside 8 mm film and, later, Super 8 mm film. In 1923, Eastman Kodak released the first 16 mm "outfit" consisting of a camera, projector, tripod, screen and splicer for $335. RCA-Victor introduced a 16 mm sound movie projector in 1932 and developed an optical sound-on-film 16 mm camera, released in 1935.