Overall Dimensions: H - 10", L - 24", W - 21" Basin Dimensions: H - 10", L - 21", W - 16" 16 Gauge Stainless Steel is 25% thicker than 18 Gauge Stainless Steel and used in most commercial kitchens. Cabinet space required is 27". This accounts for the undermount lip and clips needed for install. Drain opening is an industry standard 3.5"