The ornamental design for a handbag, as shown and described.
FIG. 1 is a front perspective view of an alternative embodiment of the handbag shown in FIG. 1;
FIG. 2 is a front view of the alternative embodiment of the handbag shown in FIG. 1;
FIG. 3 is a left side view of the alternative embodiment of the handbag shown in FIG. 1;
FIG. 4 is a right side view of the alternative embodiment of the handbag shown in FIG. 1;
FIG. 5 is a top view of the alternative embodiment of the handbag shown in FIG. 1; and,
FIG. 6 is a bottom view of the alternative embodiment of the handbag shown in FIG. 1.
The broken line showing of zipper, zipper pull, body of bag, portions of handles, rivets, tassel and rear elliptical grommets is for illustrative purposes only and forms no part of the claimed design.