Dimensions External Size: 22 inches (L) x 18 inches (W) x 9 inches (D) Internal Size: 20 inches (L) x 14 inches (W) x 9 inches (D) Drain: standard 3.5", fits standard US garbage disposal Premium Material POPFLY kitchen sink is handmade from 18 gauge thick quality T-304 grade stainless steel (18/10 chrome/nickel), Resilient and easy to clean commercial-grade satin finish resists corrosion and rust & matches most kitchen appliances Noise Cessation & Moisture Barrier Use 3mm sound guard undercoating and thick rubber padding, covering more than 90% of the sink area, reducing the sound of running water and absorb sound from the source, Ultra quiet designs. Anti-condensation Coating, isolate condensate Fast Drainage The X groove is designed for easy drainage, the a slight dip at the bottom to prevent water accumulation. While 4 drain grooves on the sloped bottom of the sink help direct water to the drain.