What you’ll need:
Leather (at least 3x4 inches)
Soldering Iron (or Wood burning tool)
Pen and paper
Sharp Pointy Object (Awl, drill, screw driver, thick needle, punch, ice pick)
A rivet (back and front)
A rivet setter
A Sewing Awl
Fold your paper in half and draw half a heart the size you want your key fob to be (about 2”).
Trace the heart cut out onto the leather, any relatively thick leather will work. Measure about a half inch centered over the top of the heart. Use the Xacto knife to cut out the heart. To get the curves of the heart, cut in small sections. You can clean the edges after the shape is completely cut out.
Use either the wedge tip on a wood burning tool, or the thinnest tip on a soldering iron. After heating up the iron, burn a short line (1/16 to 1/8 inch) on the edge of the leather heart starting from the tip. Words, pictures or designs can be added to the center or it can be left as it is.
Place the top of the rivet just above the peak of the heart and press. Use one of the sharp pointy objects (carefully) to create a hole in the first layer. Then, fold the flap of leather behind and using the first hole as a guide, punch a hole through the other side. Lining up the holes, place the bottom part or the rivet on the back, and the top of the rivet on the front. Feed the key ring through the loop.
Use a sharp pointy object to punch holes, using your design as a guide. Thread a needle, doubling the thread. With the leather folded, start sewing at the back. Push your needle through the first hole, down through the second. Loop one last time, so both ends are in the back of the piece and then double knot. If the knot hangs out a bit just poke it into the nearest hole. Feed the key ring through the loop.