Let me start by saying, you can easily cover this with some cute material or even scrapbook paper to pretty it up, but I wanted mine to be plain. I plan to keep it covered and don't want to be bothered with wanting to see said prettiness behind my magnets! :D However, I will be making some adorable magnets to hold my non sticky note papers later!
First, pick up a sheet of metal at your local hardware store. It only costs a few dollars and you can get whatever size you'd like. Remember, there will probably be no cutting of it, so get the size you want!!!
Next, take it outside with a hammer, board and a nail. Use the nail to hammer a hole in the metal so that you can hang it. Remember that if you want pretty ribbon, you'll want to use a large nail so that the hole is bigger. I used a standard nail and some rubber bands.