Bottom Width : 30 1/2" Top Width : 31 3/4" . This sink tapers from top to bottom by 5/8"3 1/2" Rear Center drain.Thickness : 3/4" Non Reversible.This sink is constructed of solid high-grade fireclay�material�using high pressure casting, ensuring durability, longevity, and resilience�to�acids, alkali''s, scratches, and chipping. Heat resistant up to 350'' F. This sink has been tested and will not crack due to heat exposure from a pot / pan up to 350'' F hot.Bowl Dimensions 14 3/4" x 16 1/4" x 7 1/4". Each bowl is equal in size.1 3/4" Lip surrounding the top edge on all 3 sides.Certified by Uniform Plumbing Code (cUPC)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. Furthermore , minor imperfections may appear. These are not defects; this is what makes each sink uniquely its own. Defective sinks will not pass our quality control inspection and would be recycled into a new sink at the factory.Can be installed via Under-Mount (countertop Over edge of sink), Top-Mount (countertop Under edge of sink), or Flush-Mount (countertop Even with sink)Now you can enjoy the benefits of a double bowl sink and still be able to store large pans completely in the sink with out the handle sticking out.