Face it: You work in a cubicle with cloth panels for walls, and you have nowhere to put your giant magnet collection. You need a way to hang them at work to remind you of why you can't just strangle everyone and walk out the door on particularly stressful days.
Here's how I make them.
Step 1: Parts Needed
1: cloth of your choosing to cover the device.
2: Sheet steel. I got 24" by 12" panels on Amazon, but you should be able to find them at home improvement/DIY type stores as well. I like to paint it black so there's no shine through the cloth and no rust to worry about.
3: an Iron
4: Hot Glue Gun
5:Foamcore, I like to use 1/8" to 3/8" thick.
6: A handful of cubicle-wall-hanging hooks. I like to pry them from the back of the document holder shown in the images, but there's many such devices. Visit your local office supply store, or wait til your work is throwing a bunch of this type of stuff away.
Step 2: Cut the Foamcore, Glue on the Steel
Cut the foamcore just a shade larger than the steel. This will prevent the steel's corners from cutting or wearing through the cloth. Also, the foamcore will help prevent the steel from being too springy or bouncy while you use it.
Using a large amount of hot glue, glue the two together.
Step 3: Cloth Facing
Cut a piece of cloth a couple inches (or more, here) larger in each axis than the foamcore/steel concoction.
Iron it out smooth, especially if there are wrinkles from storage and whatnot. Wrinkles here will be obvious when the item is hung.
The foamcore is the BACK of the stack, the steel should be directly against the "wrong" side of the cloth.
If you have it, it would be appropriate to use some spray-tack adhesive to fix the cloth to the face of the steel, but it's not required.
Step 4: Wrap the Cloth
Using more hot glue to hold everything in place, wrap the cloth around the back and glue it down strongly.
If you've ever upholstered something, this is the same process.
I'm pretty bad at it, and my corners tend to look like crap from the back, but as long as you pull it rather taut the front side will look good.
Step 5: Put on the Hangers
pry the cube-wall-hangers off whatever you have and hot-glue them to the back.
I usually use 6 for my 12"x24" panels
Step 6: Hang It and Put on the Magnets
My work forbids taking photos in an office, so you'll have to imagine what it looks like in your own cube, but the magnets stick to the steel and the cube-wall-hangers keep the panel on the walls.
If you want to improve your magnets' adhesive capabilities, Home Depot sells very small "rare earth" magnets that easily super-glue onto the back of almost anything, and will be MORE than enough to hold strong to the panel.