I claim the ornamental design for a salt and pepper shaker set, as shown and described.
FIG. 1 is an exploded perspective view of a salt and pepper shaker set, illustrating a first embodiment having two transparent containers, showing my new design;
FIG. 2 is an alternate exploded perspective view thereof;
FIG. 3 is a perspective view thereof;
FIG. 4 is a left-side elevational view thereof, the right-side elevational view being a mirror image thereof;
FIG. 5 is a front elevational view thereof, the rear elevational view being a mirror image thereof;