Quartz Composite Undermount Kitchen Sink/bar/prep/utility Sink - 14-7/8 Inch By 14-7/8 Inch - Sly Onyx Demensions- 14-7/8 inch by 14-7/8 inch exterior 12-13/16 inch by 12-13/16 inch interior 7 inch deep Extreme Strength and Durability Scratch and Stain Resistant Heat Resistant up to 535F. Non-Porous & Hygienic Surface