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 front view of the alternative embodiment of the handbag shown in FIG. 1;
FIG. 3 is a rear 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 left side view of the alternative embodiment of the handbag shown in FIG. 1;
FIG. 6 is a top view of the alternative embodiment of the handbag shown in FIG. 1; and,
FIG. 7 is a bottom view of the alternative embodiment of the handbag shown in FIG. 1.
The broken line showing of the handle assembly, grommets, handle, studs, and portions of the handbag is for illustrative purposes only and forms no part of the claimed design.