Glossary: Aspect ratio
The relationship of the frame's width to its height. To emphasize the contrast, each of the thumbnails below is two inches high; notice how the image becomes wider as the aspect ratio increases.
From The Big Sleep
Frame 1: Aspect ratio 1.37 (1.33):1
(Though the standard aspect ratio for classical Hollywood cinema was
referred to as 1.33:1, it works out to 1.37:1 on most prints.)
From Rear Window
Frame 1: Aspect ratio 1.66:1
From The Searchers
Frame 1: Aspect ratio 1.75:1
From Do the Right Thing
Frame 1: Aspect ratio 1.85:1
From 2001: A Space Odyssey
Frame 1: Aspect ratio 2.2:1
From Magnolia
Frame 1: Aspect ratio 2.35:1