Abstract: This invention relates to a formed leather sheath for covering the buckles of adjustable stirrup-supporting belts on a saddle, said sheath being characterized by a buckle-receiving pocket open on both ends, a necked-down section integrally formed on one open end sized to slide freely along the belt without passing over the buckle, strap-forming means depending from the other open end sized to encircle the belt, and fastener means cooperating with said strap means to define an openable collar effective in closed position with the necked-down position abutting one end of the buckle to engage the belt on the other end of said buckle and maintain the latter within the pocket.