Nantucket Sinks UM-16x11-B 16-Inch x 11-Inch Rectangle Undermount Ceramic Vanity Bathroom Sink, Bisque Exterior Dimensions: 18" x 12.875" Interior Dimensions: 16" x 10.875" Bowl Depth: 5.875" Drain Size: 1.5".This sink has an overflow Material: VITREOUS CHINA