Shelf

[0001]FIG. 1 is a perspective view of a shelf showing our new design;

[0002]FIG. 2 is a front elevational view thereof;

[0003]FIG. 3 is a back elevational view thereof;

[0004]FIG. 4 is a left-side elevational view thereof, the right-side elevational view being a mirror image thereof;

[0005]FIG. 5 is a top plan view thereof; and,

[0006]FIG. 6 is a bottom plan view thereof.

[0007]Broken lines in the figures illustrate portions of the shelf that form no part of the claimed design.