The ornamental design for a handbag, as shown and described.
FIG. 1 is a top, front, right perspective view of a handbag showing my new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is rear elevation view thereof;
FIG. 4 is a right elevation view thereof;
FIG. 5 is a left elevation view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken lines shown in the drawings represent stitching and form part of the claimed design.
The dot-dash lines shown in the drawings illustrate the boundary of the claimed design and form no part thereof. The even broken lines shown within the dot-dash lines illustrate portions of the article that form no part of the claimed design. The even broken lines shown outside of the boundary line represent stitching and form part of the claimed design.