The ornamental design for an off surfaceshelf, as shown and described.
FIG. 1 is a front perspective view of an off surface shelf showing our new design;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a bottom view thereof;
FIG. 5 is a front elevational view thereof;
FIG. 6 is a rear side elevational view thereof;
FIG. 7 is a right side elevational view thereof;
FIG. 8 is a left side elevational view thereof;
FIG. 9 is a front perspective view showing the drawer of the off surface shelf in an open condition and the compartment top shown in exploded condition; and,
FIG. 10 is a front perspective view showing the off surface shelf in an exploded condition.
The broken lines shown in FIG. 4 are for illustrative purposes only and form no part of the claimed design.