I claim the ornamental design for the stackable retail merchandise container, as shown and described.
FIG. 1 is a perspective view of the stackable retail merchandise container shown with unclaimed items of retail merchandise situated therein for purposes of environmental illustration:
FIG. 2 is a front view thereof;
FIG. 3 is a back view thereof;
FIG. 4 is a side view thereof;
FIG. 5 is another side view thereof, opposite the side shown in FIG. 4;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is another perspective view thereof.
The use of broken lines are for purposes of illustrating unclaimed environment of the claimed design, and form no portion of the claimed design.