1. Cut a 7 x 34 length of fabric (or length of choice depending if you want your key ring to be longer or shorter). Place the wrong sides together and sew together down the length of the fabric. Turn to the outside (can be difficult) and press flat.
2. Now fold the pressed strip in half and slip onto a key ring.
3. Sew the two open ends together. Create a thick zig-zag line in the seam allowance and cut the remaining seam allowance away, leaving the zig-zag edge. Turn the fabric so that the just made seam allowance cannot be seen.
4. Finally, sew a line across the strip just below the key ring, so the ring stays in place.