To qualify for this category, the film must be 40 minutes or less. "Mona Lisa Descending a Staircase” and "The Cat Concerto” are two examples.

Back when reels were used to make film, the longer films were awarded as a "short subject – two-reel" while the shorter films were awarded as "short subject – one-reel". Whether artistic, like Joan Gratz's film featuring 20th-century art becoming different pieces of art or more cartoonish, like "The Cat Concerto," to qualify as an animated short, the film has to be under forty minutes, including credits.

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