Sandal upper

FIG. 1 is a perspective view of a sandal upper showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevation view of one side thereof;

FIG. 4 is a side elevation view of the other side thereof;

FIG. 5 is a front elevation view thereof; and,

FIG. 6 is a rear elevation view thereof.

The broken line showing of the shoe sole in the figures is for illustrative purposes only and forms no part of the claimed design.