The differences tend to be less than an inch either way and are usually within round-up distance of the appropriate size. For example, a 50-inch TCL 4-Series TV has a 49.5-inch viewable display.

Quick tip: If you don't have a tape measure, you could use a few sheets of 8.5 inch by 11 inch paper to measure the TV. You can also use a dollar bill, which is 6 inches long and 2.5 inches tall.