The ornamental design for a shower pedestal, as shown and described.
FIG. 1 is a perspective view of a shower pedestal showing my new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a left-side elevation view thereof;
FIG. 5 is a right-side elevation view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
Suction cups illustrated in dashed lines are one of many attachment mechanisms that can be used to attach the shower pedestal to a shower or bathroom wall; they are shown for illustrative purposes only and form no part of the claimed design. Similarly, broken lines illustrate the tops of screws, particularly evident in FIGS. 6 and 7. The screws are shown for illustrative purposes as one of many mechanisms for coupling the top pedestal body to the post and forms no part of the claimed design.