A frame assembly includes a frame base and a rear panel including a plurality of side walls that are configured to be received within a plurality of side walls of the frame base. Along an external surface of each side wall of the rear panel there is at least one locking tab that is configured for reception within one corresponding locking opening of the frame base when the rear panel is inserted into the frame base so as couple the rear panel to the frame base in a snap-fitting manner and permit a canvas substrate to be captured therebetween for holding the canvas substrate across a front face of the frame base.