I claim the ornamental design for a packing box for confectionery, as shown in color.
The file of this patent contains at least one drawing or photograph executed in color. Copies of this patent with color drawing(s) or photograph(s) will be provided by the Patent and Trademark Office upon request and payment of necessary fee.
FIG. 1 is a front/left-side/top perspective view of a packing box for confectionery showing my new design;