Step 1: First, measure your TV.
Your TV size will determine all of your other measurements – wood, picture frames, and drawer slides. Keep this in mind – I used 8″ deep wood because our TV is mounted on an arm that pulls out, so the total depth of the TV plus the arm is about 7″.
If you don’t have that arm and/or your TV is mounted very close to your wall, you can adjust your wood depth to something more suitable for your space (as well as the large L bracket size). Heck, if you have one of those fancy flat mount TVs, you may not even need the side pieces you see on ours!I also suggest leaving at least 2″ of space all around the TV. So if your TV measures 40″ wide, add 4″ – 2″ for each side. And if your TV is 25″ high, add another 4″, for a total of 29″ – these measurements will help you figure out your picture frame size.
Our frames are 20×24, but with the 1.25″ frame, each measures 22.5″x25.5″. You may have to adjust you wood lengths based on your picture frames, given standard frame sizing.
You can also search chunkier frames (i.e the frame itself is 2″ thick) to add extra space if needed. Just play around with the measurements until they work for your space.
(THERE ARE MORE DETAILS ABOUT MEASUREMENTS ON MY BLOG IN THE WHAT YOU'LL NEED SECTION)
Step 2: Gather all the materials you see above, according to your own personal measurements.