FIG. 1 is a perspective view, from the front and right side, of a sole for footwear, showing my new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a front end view thereof; and,

FIG. 6 is a rear end view thereof.

The broken line showing of an upper part of the sole in the figures is for illustrative purposes only and forms no part of the claimed design.