Position a 1-by-1-by-5-inch wood block on your work surface. Use the ruler to draw a diagonal line from one corner to the opposite corner.
Place the wood block in the vise or within a miter box, and use the saw to cut the block in half along the line, creating two wood wedge door stops.
Sand each surface of the wood block with medium grit sandpaper, paying particular attention to the edges and corners. Continue to sand until the edges and corners feel smooth.
Position one of the wedges with its largest surface, or hypotenuse, on top of a sheet of felt. Slice around the edge of the wedge with a utility knife. Repeat for the other wedge with another piece of felt.
Apply glue to the wood wedge on the largest hypotenuse side. Press the felt against the wood wedge and allow the glue to dry for three hours, resting the wedge on a wooden side and not the felt side to prevent the glue from soaking through and sticking to the ground. Repeat for the other wedge and felt piece.