I've been holding onto this DIY for awhile, so I've had time to put the frame to use and test it before sharing it with you guys. And the verdict is... it works like a charm! To help our absentmindedness, we have a cabinet in the middle of our home that serves as a table for our keys, phones, and sunglasses. As you can imagine, it can get pretty cluttered especially with all the glasses strewn about. So I finally got fed up and decided to do something about it.
What you'll need:
1) If your frame has glass and/or cardboard, remove the glass and everything else so you're left with the frame only.
2) Place your sunglasses down and configure them the way you would want them to hang to measure spacing.
3) Hammer in nails to the sides and use pliers to wind the metal wire around the head of the nail. Remember to keep the wire as taut as possible.
It should look like this from the front:
4) Hang your glasses!