Be forewarned, the measurements are inaccurately pictured, so if it is a tight fit be cautious. The base measurement shown is actually the seat measurements. The base itself is 3-4in wider than shown in the diagram. I ordered 4 assuming the dimensions were accurate only to find 3 would actually work. Had to pay return shipping on the one. So just be careful to make sure you have extra space to allow for the inaccurate measurement.