Swanstone CV2231-042 Contour Solid Surface Single-Bowl Vanity Top, 31 22-Inch, Gray Granite 31-Inch by 22-Inch Bowl: 20-1/8-Inch by 13-Inch by 5-1/2-Inch Pre-drilled for center hole only with drill-outs for 4-Inch or 8-Inch centers Includes overflow Features a single, center bowl