This TV measurements are listed on the Amazon page as 12.3 x 57.4 x 36.1. I assume that is 12.3 inches from the front of the stands to the back of the stands as they are attached to the TV. The 57.4 inches is the total Width of the TV as it sits there. The 36.1 inches of the TV is from Top to Bottom as it sits on the stand. Now it could be the 36.1 inches is without the stand but I do not think so.
Very few, if any TVs have a headphone jack any more. What you can do is look for a TV that transmits Bluetooth and get a pair or Bluetooth wireless headphones.