The ornamental, design for panel for a shoe, as shown and described.
FIG. 1 is a perspective view of panel for a shoe showing our new design;
FIG. 2 is an enlarged detail view of the area 2 taken from FIG. 1;
FIG. 3 is a front elevation view thereof;
FIG. 4 is an enlarged detail view of the area 4 taken from FIG. 3;
FIG. 5 is a back elevation view thereof;
FIG. 6 is an enlarged detail view of the area 6 taken from FIG. 5;
FIG. 7 is a right side elevation view thereof;
FIG. 8 is an enlarged detail view of the area 8 taken from FIG. 7;
FIG. 9 is a left side elevation view thereof;
FIG. 10 is a top plan view thereof;
FIG. 11 is an enlarged detail view of the area 11 taken from FIG. 10; and,
FIG. 12 is a bottom plan view thereof.
In the drawings, the broken lines represent unclaimed environment subject matter and form no part of the claimed design. Likewise, the dash-dot-dot lines represent boundary lines that form no part of the claimed design.