1. 1. Preparation materials: thick needles and wool. Start sewing, sewing 8 stitches, as shown in the figure.

2. First knit a row of stitches, divide 8 stitches into 3 stitches, put one stitch in each stitch and one stitch in the next stitch, ***8 times, and it becomes 16 stitch. All the stitches in the next row are the same.

3. On the second lap, weave a lap without addition or subtraction.

4. On the third lap, knit two stitches and add one stitch; The fourth lap does not increase or decrease; On the fifth lap, knit 3 stitches and add 1 stitch (each stitch must be added next to one of the 8 stitches).

5. On the sixth lap, knit 4 stitches and add 1 stitch. On the seventh lap, knit 5 stitches. Repeat this operation to weave to the required length.

6. After knitting to the required length, knit 8- 10 stitches and close one stitch to complete the loop. Start knitting the brim. Hat edge knitting: stitch by stitch, stitch by stitch to the length you need. Then close the needle, break the thread and hide the thread.

7. Thread the thread on the top of the hat and tighten, fasten and disconnect it. So the octagonal hat is woven, as shown in the figure.