US D661071 S1
The ornamental design for a footwear sole, as shown and described.
FIG. 1 is a front elevational view of a footwear sole showing our new design.
FIG. 2 is a rear elevational view thereof.
FIG. 3 is a left side elevational view thereof.
FIG. 4 is a right side elevational view thereof.
FIG. 5 is a top plan view thereof.
FIG. 6 is a bottom plan view thereof; and,
FIG. 7 is a bottom perspective view thereof.
The portions shown in broken lines in FIG. 5 form no part of the claimed design.