Part of the Boutique Collection, the Alissa lavatory sink is constructed using MTI's "ESS" (Engineered Solid-Surface) composite material, which is a mixture of ground natural minerals and binding agents that are liquefied, poured and then hardened. Think of molded stone. Non-porous, stain-resistant, mold and mildew-resistant. The Alissa LV lavatory sink measures 21.375" x 13.625" x 4.875" deep.