The ornamental design for a box for cosmetics, as shown and described.
FIG. 1 is a perspective view showing our 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 right side elevation view thereof; and,
FIG. 6 is top plan view thereof.
The broken lines shown in the drawing disclosure are for illustrative purposes only and form no part of the claimed design. The broken lines(s) which define the bounds of the claimed design form no part of the claimed design.