Kohler. Available with or without an overflow, the Bachata stainless steel undermount lavatory sink has a luster finish that provides a softer look in the bathroom and complements brushed nickel fixtures. The overflow version has a four-square design with a plastic shell channel to subdue the sometimes clumsy look of overflows. The sink measures 17 inches wide by 14 inches long — the standard size for bathroom lavs, making it ideal for remodeling. 800.456.4537. www.kohler.com.