Make sure this fits by entering your model number. EXTRA WIDE: Expands to stairways and openings between 22-38 inches wide. Stands 18 inches tall. Pressure mount design that is quick to set up. No tools required and is gentle on walls SMALL PET DOOR: Patented small pet door is 9 x 9 inches. Let’s small pets pass through, while keeping everyone else out. Includes locking feature.