The ornamental design for a portion of a fabric, 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 top surface view of a portion of a fabric showing my new design; and,
FIG. 2 is an enlarged detail view of the design of FIG. 1 within the area of FIG. 1 defined by lines A-A and B-B.
The bottom view is a mirror image of FIG. 1. The portion of a fabric is planar.