The ornamental design for a pair of sandals, as shown and described.
FIG. 1 is a bottom view of a pair of sandals showing my new design.
FIG. 2 is a right side view of a pair of sandals
FIG. 3 is a left side view of a pair of sandals.
FIG. 4 is a plan view of a pair of sandals.
FIG. 5 is front view of a pair of sandals; and,
FIG. 6 is a back view of a pair of sandals.
Shown is a sandal for a right foot. Also claimed is a sandal for a left foot wherein all Figures are mirror images of the Figures shown above. The portions of the design shown in broken lines form no part of the claimed design.