Parking Lot Curbs 6 x 6 x 8 4 x 6 x 6 Heavy Duty Curbs 8 x 8 6 x 8 6 x 6 4 x 8 Parking Bumpers - Installed or Sale and Deliver Them To You To Install They are about 6 feet long standard parking bumpers with rebar pins to hold in place.