My friend Steve requested a key-shaped key hanger for Christmas, (and I finished it just in the nick of time). It's a fairly easy project if you have a drill-press and scroll/band saw. Total cost of the project was $1.73 for the key hanger hooks from the local hardware store.
I always have a wide selection of plywood stock handy for last-minute projects, but hardwoods like pine or birch would have been fine for this project as well, I just like how the grains come out on the top layer of the ply once it's finished.
3/4" thick plywood
4 Brass Cup Hooks ($1.73 at my local hardware store)
Minwax Wood Finish
Sandpaper (assorted grits between 80-320)
Slot-cutting bit (optional)
Center Punch tool + Hammer (optional)
Safety Glasses (mandatory)
Step 1: Find a Template
This step is pretty straightforward (for you anyway) - I have attached the template, so you can just print it out and tape the two parts together. (This template was created from two different key patterns I found online, so it is technically a completely unique design).
I taped the cut-out template to my plywood piece, and marked the centers of all the hole positions with a hammer and center punch (a pen works just as well too).
I've detailed the sized of the holes to be drilled in the attached image.