To measure a TV, you primarily measure the diagonal length of the screen from one corner to the opposite corner. This measurement gives you the TV size in inches. It is important to measure just the visible screen area, excluding the frame or bezel around the edges. Additional measurements that can be useful include:

• The width: measure horizontally from one side of the screen to the other.
• The height: measure vertically from the top to the bottom of the screen.
• The depth or thickness: measure from the front of the screen to the back of the TV if space constraints matter.

These dimensions help in ensuring the TV fits your space properly, especially if you plan to wall mount it or place it in a cabinet. The diagonal screen size is the most commonly used size descriptor for TVs. In summary:

• Use a tape measure or ruler.
• Measure diagonally across the visible screen only (corner to corner).
• Optionally, measure width and height for the full screen size.
• Be careful not to include any bezel or frame in the diagonal measurement.

This is the standard way to measure TV size for purchasing and fitting purposes.