Sandal

FIG. 1 is a perspective view of a sandal showing my new design; FIG. 2 is a right side view thereof; FIG. 3 is a top view thereof; FIG. 4 is a left side view thereof; FIG. 5 is a back view thereof; FIG. 6 is a bottom view thereof; FIG. 7 is a front view thereof; FIG. 8 is a perspective view of another embodiment of a sandal; FIG. 9 is a right side view thereof; FIG. 10 is a top view thereof; FIG. 11 is a left side view thereof; FIG. 12 is a back view thereof; FIG. 13 is a bottom view thereof; and, FIG. 14 is a front view thereof. The broken lines depict portions of the sandal that form no part of the claimed design.