The ornamental design for a band for a shoe upper, as shown and described.
FIG. 1 is a top perspective view of a band for a shoe upper;
FIG. 2 is a front view of the band for a shoe upper;
FIG. 3 is a rear view of the band for a shoe upper;
FIG. 4 is a lateral side view of the band for a shoe upper;
FIG. 5 is a medial side view of the band for a shoe upper;
FIG. 6 is a top side view of the band for a shoe upper; and,
FIG. 7 is a bottom view of the band for a shoe upper.
Broken lines shown within the solid lines defining the band for a shoe upper represent stitching and form no part of the claimed design. Broken lines shown elsewhere in the drawings of the band for a shoe upper illustrate the environment of the claimed design and also form no part of the claimed design.