A system including interchangeable components for constructing a number of different shelves. The components include a shelf channel, first and second bases, and first and second supports. The channel includes first and second channel legs positionable along a front edge and a lower surface, respectively, of a shelf member. The bases each include a first base leg couplable to a wall and a second base leg positionable under the shelf member. The first support is couplable to the second base leg of the first base to form at least a portion of a first brace. The second support is couplable to the second base leg of the second base to form at least a portion of a second brace. The supports each include a bracket that is couplable to the wall. The first and second braces support the channel and the shelf member.