Support devices and graphic display systems in which the graphic display material is supported by a support device that is rollable with the flexible graphic display material, eliminating the need for traditional frames or stands. The support devices include a thin-walled elongate body having a length extending between first and second ends and having first and second side edges extending along the length of the elongate body. The side edges include at least one recess or protrusion for selectively locking the side edges together to selectively orient the elongate body in an elongate tube-shaped configuration when the side edges are selectively locked together. The thin-walled elongate body is sufficiently flexible so that when the side edges are disengaged from each other the elongate body can be rolled along its length into a tube-shaped configuration for storage.