12" rough. 1.6 gpf round front, siphonic wash, slotted rim bowl, water surface area 7-3/4" x 6-1/2". Includes: 2" glazed trap way, toilet seat, ballcock, flush valve, wax ring, two (2) brass floor bolts with washers and nuts, plastic bolt caps, two (2) brass tank to bowl bolts with washers, nuts, and gaskets, three (3) vinyl tank to bowl protective bumpers. Meets Federal specifications: ASME A112.19.2M-1998, Energy Policy Act of 1992, CSA - B45 SERIES, APMO - UPC.

Tank is 20" Wide