The ornamental design for luggage tag, as shown and described.
FIG. 1 is a perspective view of the luggage tag the bag to which it is attached is shown in dotted lines, does not form part of the present invention and is not claimed;
FIG. 2 is a front view of the embodiment described in FIG. 1;
FIG. 3 is a left side view of the embodiment described in FIG. 1;
FIG. 4 is a right side view of the embodiment described in FIG. 1; and,
FIG. 5 is a top view of the embodiment described in FIG. 1.