The Australian film, The Story of the Kelly Gang, was the first feature length film in history. You can see the cast, box office, and budget details on IMDB. It was over an hour long, and the reel length was about 4,000 feet. To put that in perspective, a small 5-inch reel of film holds up to 200 ft., a 6-inch holds 300 ft. and a 7-inch 400 ft. Depending on the size of the reel that, movie is housed
in, that’s at least 10 reels of 7-inch film and at most 20 reels of 5-inch film. Imagine that!
