FIG. 1 is an upper perspective view of the decorative piece for a suitcase showing my design.

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is an opposite side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a cross-sectional view taken from the lateral center of FIG. 2 thereof; and,

FIG. 9 is a perspective view showing attachment to a suitcase.

The broken line showing of a suitcase, in FIG. 9, is for illustrative purposes only and forms no part of the claimed design.