What is the aspect ratio of most traditional CRT monitors?

The aspect ratio of most traditional CRT monitors is 4:3. This ratio reflects the standard dimensions of older television sets and computer monitors before widescreen formats became common. In a 4:3 aspect ratio, the width is 4 units for every 3 units of height, which yields a nearly square display.

During the height of CRT usage, this was the dominant format for both computer displays and television broadcasts, allowing for compatibility with the majority of content available at that time. Originally designed to match the shape of the human field of vision, the 4:3 aspect ratio suited various applications from gaming to business use.

The other aspect ratios listed represent formats that became more prevalent with the advent of LCD and LED technology, which shifted towards wider screens to accommodate cinematic viewing and enhanced productivity with split-screen tasks. These widenings reflect changing consumer preferences and advancements in visual media but do not pertain to traditional CRT monitors.