Step 3: Don't forget to add height!
***REMEMBER*** TVs can overheat so you need to include at least an additional two inches of height to provide adequate heat dissipation, for more info consult your TV manual for specific ventilation needs of your set.
My TV with the stand was 27 and 3/8 inches so I rounded my vertical measurement to 29.5" and added an additional 1 and 1/4 since that was the thickness of my desktop. This is for mounting to the side of the desktop, (see photos 2 and 3 for clarification).
You will need two of these cut.