It’s been a while since I shared a DIY - here’s one I did recently on the pair of shoes from this post. Unfortunately they’re now sold out, but this will work on anything with a covered heel. Here are a few similar pairs I found - 1, 2, 3 - but it’s probably a better idea to do this on something you already own and want to refresh. Instructions after the jump :)

You need:
Some tape (and a marker)
Tape measure
Phillips screwdriver
Some screw studs (I used these)
A hole punch or dart awl

Step by step
1. Place some transparent tape over the back seam of your shoes. The idea is to make precise markings, and the tape lets me do that with a Sharpie without damaging the shoe and still see what’s underneath, so if you’d like to use something else (ie. chalk or pencils - works just as well) you can skip this step :)
2. Make a little dot on the tape where you want your studs to be. I used a fine point black Sharpie for this, but for illustration purposes I’ve dotted it red in the picture. For the size 13 cone studs that I used the holes needed to be a minimum of 1 cm apart. Make sure they are dead center, though if your shoe has a regular seam at the back there should only be one line.
3. Take the hole punch (or dart awl) and make a hole where you’ve marked them out. Insert screw base as pictured.
4. Screw on studs, tighten properly with screwdriver, and you’re done! Easy!

For shoes with a back seam that look like mine here, a hole punch is probably easier as there is a bit of extra leather to punch through. If your shoes have a regular seam, a dart awl would work just fine. Make sure you screw the studs on tight and the screw base sits flush inside otherwise they will be uncomfortable.

Enjoy!