Aspect Ratio

The ratio of the width of the picture to the height; the measurements defining the screen measurements. The film projected on the screen can vary from a "television-like" 1,33:1 (or 1,37:1) to a very long rectangle (e.g. CINEMASCOPE) such as 2,35:1. The contemporary screen aspect ratio is usually 1,85:1.

| 1.33:1 | 1.66:1 | 16:9 | 1.85:1 | 2.35:1 |

Aspect ratio
[en.wikipedia.org/wiki/Aspect_ratio_(image)]

Master Class [Guide to Aspect Ratios: 8 Film and TV Aspect Ratios - 2023 - MasterClass]