I have seen several of these wreaths for sale this year and they are expensive. After a little research, I found these instructions online.
Take a wire coat hanger and bend it into a circle. You will need about 80 round ornaments in varying sizes to make the wreath. To secure the metal cap to ball, dab a little hot glue and press to insure that the cap will remain attached as the ornaments are strung. Untwist the end of the hanger, then string one ornament at a time. Make sure you alternate placement and colors. Use smaller sizes to fill gaps.