Cut out the pieces using the pattern. Cut 5 to 7 thin strips (6 to 8 inches long) for the trimming.
Sew together the 4 pieces of the hat body. Pay careful attention during construction to make sure the seams are all on the same side (machine stitching it difficult to rip out of felt). At this point the hat should look like this. Seam allowance is figured to be the width of a standard presser foot.