Measure the screen diagonally from one corner to the opposite corner
Measure only the visible screen area, not the bezel or frame
Use a tape measure for accuracy
Record the measurement in inches
Check the TV’s listed size against your measurement
Measure width and height separately if needed for fitting space
Measure from the bottom-left corner to the top-right corner or from the bottom-right corner to the top-left corner
Keep the tape measure straight across the screen
Do not include any stand or mounting parts in the screen size measurement