A frame having one or more wall mount angle brackets. The wall mount brackets have a plate for mounting to a wall and a horizontally projecting surface. Outer brackets connect through slotted plates to the wall brackets allowing for variation in the depth of the object supported by the frame, i.e. the distance that the object projects from the wall. The outer brackets are themselves made of two pieces that join through slotted plates allowing for variation in the height of the supported object.