The ornamental design for a handle for a bag, as shown and described.
FIG. 1 is a perspective view of a handle for bag showing my new design, the
partial showing of a bag in dotted lines being for illustrative purposes
only;
FIG. 2 is an enlarged scale side elevational view thereof with intermediate
portions on either side of the handle being broken away and omitted for
convenience of illustration;
FIG. 3 is a top plan view thereof; and
FIG. 4 is an enlarged scale end elevational view thereof.