3 aircraft and 3 cabin layouts, from the A320 to the 737 MAX 8-200. Pick one for its seat map, the best seats and the seats to avoid.
There are seat maps for 3 Ryanair aircraft here: the Airbus A320, the Boeing 737 MAX 8-200 and the Boeing 737-800.
The Boeing 737 MAX 8-200, with 197 seats: 197 Economy in its main layout.
The Airbus A320, with 28.5" - 35" of seat pitch in Economy and seats 18" wide.