The ornamental design for a handbag, as shown and described.
FIG. 1 is a top, front, left perspective view of a handbag showing my new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is right side elevation view thereof;
FIG. 5 is a left side elevation view thereof;
FIG. 6 is a top, front perspective view thereof; and,
FIG. 7 is a bottom perspective view thereof.
The even length broken lines shown in the drawings represent stitching and form part of the claimed design.
The uneven length broken lines illustrate a trademark that does not form part of the claimed design.
The uneven length broken lines illustrate the boundary of the claimed design and enclose the interior portion of the handbag that does not form part of the claimed design.