FIG. 1 is a right front perspective view of a decorative cover for sneakers showing my new design, the broken-line showings being for illustrative purposes only and form no part of the claimed design;

FIG. 2 is a right front perspective view thereof in a partly open condition; the broken- line showings being for illustrative purposes only and form no part of the claimed design;

FIG. 3 is a left front perspective view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a front elevation view;

FIG. 6 is a side elevation view;

FIG. 7 is an elevation view from the opposite side;

FIG. 8 is a rear elevation view; and,

FIG. 9 is a bottom plan view.