FIG. 1 is an elevational view of one side of a heel insert for a shoe sole showing my new design;

FIG. 2 is an elevational view of the other side thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a cross sectional view taken along line 5--5 of FIG. 1; and,

FIG. 6 is a cross sectional view taken along line 6--6 of FIG. 1.

The broken lines showing the remaining portions of the sole and shoe upper in FIGS. 1-6 form no part of the claimed design.