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 32 to 82 inches being typical for most consumers.8 The most popular size currently is 55 inches, which offers a balanced combination of screen size, affordability, and suitability for various room types.9

For smaller spaces like kitchens, bedrooms, or dorm rooms, TVs under 32 inches—such as 24-inch or 32-inch models—are ideal, as they provide clear visuals without overwhelming the area.910 Medium-sized TVs, ranging from 32 to 49 inches, are well-suited for small to medium-sized living rooms, dens, or bedrooms.9 A 43-inch TV, for example, measures approximately 97 cm wide and 56 cm high.2

Large TVs, typically 50 to 65 inches, are recommended for bigger living rooms or home theater setups where viewers sit farther from the screen.9 A 55-inch TV is often considered a good starting point for most living rooms, fitting comfortably in spaces around 14' x 14' (4.3m x 4.3m).10 For those seeking a cinematic experience, 65-inch and larger models are increasingly popular, especially in spacious rooms or dedicated home theaters.9

Extra-large TVs, 70 inches and above, are best suited for large living areas or home theaters with sufficient viewing distance.9 A 75-inch TV, for instance, measures approximately 168 cm wide and 95 cm high 2 , while an 85-inch model is about 189 cm wide and 109 cm high.6

The ideal viewing distance depends on the TV’s resolution and size. For 4K TVs, recommended distances range from 3 to 5 feet for a 40-inch screen up to 10 to 13 feet for an 80-inch screen.45 For Full HD TVs, the recommended distance is generally farther—around 6 to 7 feet for a 40-inch screen and up to 13 to 15 feet for an 80-inch screen.45 A general rule for 4K TVs is to sit at a distance of about 2.1 cm per inch of screen size 2 , while for Full HD, the recommendation is 4.2 cm per inch.2

The optimal viewing height places the center of the screen at eye level or slightly below to reduce eye strain, ideally around one meter from the floor, though this may vary based on seating height and personal preference.2 For viewers using recliners or lying down, the TV may need to be mounted higher, up to 1.8 meters.2 OLED technology allows for excellent viewing angles, making large screens suitable even when seated off-center.2