The ornamental design for a handbag, as shown and described.
1. Handbag
1.1is a perspective view of a handbag;
1.2is a front view thereof;
1.3is a back view thereof;
1.4is a left side view thereof;
1.5is a right side view thereof;
1.6is a top view thereof;
1.7is a bottom view thereof; and
1.8is a perspective view with the strap thereof.
The broken lines in the figures are for the purpose of illustrating claimed stitching. The back side of the shoulder strap that is not shown in the figures forms no part of the claim.