5 aircraft and 7 cabin layouts, from the A320 to the 787-8. Pick one for its seat map, the best seats and the seats to avoid.
There are seat maps for 5 Jetstar aircraft here: the Airbus A320, the Airbus A320neo, the Airbus A321, the Airbus A321LR and the Boeing 787-8.
The Boeing 787-8, with 325 seats: 44 Business and 281 Economy in its main layout.
The Boeing 787-8, with 30" of seat pitch in Economy and seats 17" wide.