The diagonal measurement of a TV screen is from corner to corner. Measure at the corner of the screen. A 32-inch TV measures 32 inches (81cm) from the bottom left to the top right or bottom right to the top left of screen. Flat screen TVs starting at $99 for models with 32 inch screens or less. Sets measuring around 40 inches cost between $150-$400. A model with a larger screen (77 inches or more) could cost you up to $7,000