VIGO Hibiscus Matte Stone Vessel Bathroom Sink Above-counter installation, Non-porous, stain resistant and fire retardant Exterior Dimension: 16-in. L x 16-in. W x 4.625-in. H, Interior Dimensions: 15.375-in. L x 15.375-in. W Solid core PMMA construction means you will never see chips or scratches Smooth rounded corners, Sanding Circle included to provide quick and easy removal of stubborn blemishes or marks cUPC certified, ADA Compliant, Limited Lifetime Warranty Standard 1.75-in. drain opening