A repositionable rail system for a refrigerator includes first and second rails, each rail having a plurality of spaced-apart apertures. A crossbar has first and second ends adapted to fit within respective apertures on the first and second rails. After inserting the crossbar into the apertures, the crossbar is rotated to a fixed angled position. A half-width shelf having a hook is adapted to removably supported, in a cantilevered manner, by the crossbar. The half-width shelf can be slid along the crossbar for repositioning within the refrigerator cabinet, or may be placed alongside another half-width shelf on a crossbar, or replaced with a full width shelf mounted on the first and second rails in a corresponding, cantilevered manner.