3 aircraft and 3 cabin layouts, from the 737-800 to the 777-300ER. Pick one for its seat map, the best seats and the seats to avoid.
There are seat maps for 3 Turkmenistan Airlines aircraft here: the Boeing 737-800, the Boeing 777-200LR and the Boeing 777-300ER.
The Boeing 777-300ER, with 368 seats: 40 Business, 32 Premium Economy and 296 Economy in its main layout.
The Boeing 777-300ER has Premium Economy in at least one layout.
The Boeing 777-200LR, with 32" of seat pitch in Economy and seats 18" wide.