A parking space sign system that is mountable to existing parking bumpers or includes a flexible support structure for placement in parking spaces with parking bumpers, a frame mount having at least one transparent frame sleeve formed by sleeve flanges, at least one panel with indicia on its face and at least one mounting aperture for mounting the frame to a parking bumper with hardware or slotted end caps instead of mounting apertures in the frame mount for sealing the ends of the frame mount and securing it to a parking bumper.