This sink is constructed of solid high-grade fireclay material using high pressure casting, ensuring durability, longevity, and resilie Designed in Italy, Made in Italy Exterior Dimensions : 23 5/8″ x 18″ x 10″ Inner Bowl Size : 21 1/4″ x 15 3/8″ x 8 1/2″ Standard 3 1/2″ center drain. compatible with garbage disposal Capable of being installed via Under-Mount (countertop Over edge of sink), Top-Mount (countertop Under edge of sink), or Flush-Mount (countertop Even with sink) Bottom Width : 23 1/8″ Top Width : 23 5/8″ . This sink tapers from top to bottom by 1/2″ Possesses Extra-Thick Fireclay walls of 1 3/8″ Due to the organic nature of the fireclay, material dimensions may vary by 1/8″ of an inch. We recommend having the sink on location to trace and measure for countertop and cabinet cut outs.