The ornamental design for jacket for bag, as shown and described.
The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee.
FIG. 1 is a front perspective view of a jacket for bag in accordance with the new design;
FIG. 2 is another perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear side view thereof; and,
FIG. 5 is a right side view thereof.
The broken lines showing a portion of a handbag are for the purposes of illustrating environment and forms no part of the claimed design.