3 aircraft and 3 cabin layouts, from the 737 MAX 8 to the 777-200ER. Pick one for its seat map, the best seats and the seats to avoid.
There are seat maps for 3 Jin Air aircraft here: the Boeing 737 MAX 8, the Boeing 737-800 and the Boeing 777-200ER.
The Boeing 777-200ER, with 393 seats: 48 Premium Economy and 345 Economy in its main layout.
The Boeing 777-200ER has Premium Economy in at least one layout.
The Boeing 777-200ER, with 30" of seat pitch in Economy and seats 17.3" wide.