Vestaba Polished Basalt Vessel Sink - BlackJust the atypical basalt stone alone should be enough to set this vessel sink apart from others. Other plusses include the smooth finish and perfectly round shape. Overall Dimensions: 15 3 4" Diameter x 4 3 4" H ( 1 2") Interior Dimensions: 15" Diameter ( 1 2") Hand Carved Natural Basalt Construction No Overflow 3 1 2" Basin Depth Polished, Smooth Interior and Exterior (Black Finish) Variations in Color, Shape and Size Make Each Sink Unique StoneTech