We claim the ornamental design for a hanger for ironing board, as shown and described.
FIG. 1 is a perspective view of a hanger for ironing board showing the new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a left-side elevation view thereof;
FIG. 5 is a right-side elevation view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is a perspective view showing a state of use thereof.
The broken line showing of the ironing board in FIG. 8 is for the purpose of illustrating environmental structure and forms no part of the claimed design.