TV size refers to the diagonal measurement of the screen, taken from the upper-left corner to the lower-right corner of the display.8 Common TV sizes range from 24 inches to 85 inches or more, with most consumers choosing models between 32 and 82 inches.8 The most popular size currently is 55 inches, which offers a versatile balance between screen size, affordability, and space compatibility, making it suitable for both medium-sized living rooms and smaller spaces.9

For smaller areas like kitchens, bedrooms, or dorm rooms, TVs under 32 inches—such as 24-inch or 32-inch models—are ideal, as they provide sharp visuals without overwhelming the room.910 Medium-sized TVs (32 to 49 inches) work well in small to medium living rooms, dens, or bedrooms, with 43-inch and 49-inch models being particularly popular for bedroom use.910

Large TVs (50 to 65 inches) are recommended for bigger living rooms or home theater setups where viewers are seated at a greater distance from the screen.9 A 55-inch TV is often considered a good starting point for most living rooms, offering an immersive experience without dominating the space.9 For those seeking a cinematic feel, 65-inch and larger models are ideal, especially in spacious rooms with sufficient viewing distance.9

Extra-large TVs (70 inches and above) are best suited for dedicated home theaters or large living areas where viewers can sit at a distance of at least 9.5 feet (2.9 meters) for a 75-inch TV or more.79 The recommended viewing distance depends on the resolution: for 4K TVs, the ideal distance is roughly 2.1 cm per inch of screen size, while for Full HD TVs, it is about 4.2 cm per inch.2 For example, a 55-inch 4K TV should be viewed from approximately 6.5 to 7.5 feet away, while a Full HD version would require a distance of 8.5 to 9.5 feet.45

Dimensions vary by size: a 55-inch TV is approximately 123 cm wide and 71 cm high, while an 85-inch model measures about 189 cm wide and 109 cm high.6 The optimal viewing height places the center of the screen at eye level or slightly below to reduce eye strain, with the center typically around 1 meter from the floor.2 Adjustable mounts are recommended for non-traditional viewing positions, such as recliners or beds.2