I claim the ornamental design for a sandal, as shown and described.
FIG. 1 is a top front perspective view of a sandal, showing our new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is bottom plan view thereof;
FIG. 4 is a right side elevation view thereof;
FIG. 5 is a left side elevation view thereof;
FIG. 6 is a front elevation view thereof;
FIG. 7 is a rear elevation view thereof; and,
FIG. 8 is a top front perspective view of the sandal, the same view as FIG. 1, the only difference is the disclaimed tip.
The dash-dot-dash broken lines represent the bounds of the claimed design, while all other broken lines shown in the drawings depict portions of the sandal that form no part of the claimed design.