3 aircraft and 3 cabin layouts, from the A320 to the A330-300. Pick one for its seat map, the best seats and the seats to avoid.
There are seat maps for 3 Discover Airlines aircraft here: the Airbus A320, the Airbus A330-200 and the Airbus A330-300.
The Airbus A330-300, with 285 seats: 30 Business, 28 Premium Economy and 227 Economy in its main layout.
The Airbus A330-200 and the Airbus A330-300 have Premium Economy in at least one layout.
The Airbus A320, with 28.0" - 34.0" of seat pitch in Economy and seats 18" wide.