2. Draw a circle with a suitable size, cut silk floss and two pieces of cloth according to the pattern, and leave a seam.
3. Cut out suitable petals with thick canvas and fix them in a proper position between two pieces of cloth.
4. Fix the appearance and sew a circle with thread.
5. If there is any extra cloth, subtract it. If appropriate, this step is not needed. Cut off the teeth, it will flatten out easily. Turn out, put in silk cotton or pearl cotton, adjust and seal.
6. Sew the button in the right position and cut the buttonhole, and it's done.