The ornamental design for a handbag, as shown and described.
FIG. 1 is a front perspective view of an alternative embodiment of the handbag;
FIG. 2 is a front view of the alternative embodiment of the handbag in FIG. 1;
FIG. 3 is a rear view of the alternative embodiment of the handbag in FIG. 1;
FIG. 4 is a right side view of the alternative embodiment of the handbag in FIG. 1;
FIG. 5 is a left side view of the alternative embodiment of the handbag in FIG. 1;
FIG. 6 is a top view of the alternative embodiment of the handbag in FIG. 1; and,
FIG. 7 is a bottom view of the alternative embodiment of the handbag in FIG. 1.
The broken line showing of the tassel, closure flap mechanism, rivets, buckles, zippers, zipper pulls, strap assemblies, handles, and body of the bag is for illustrative purposes only and forms no part of the claimed design.