Tigerair Australia flies their A320 in a 180 seat capacity with 18 'Extra Leg Room' seats, 36 'Up Front' seats and 126 regular Economy seats.
Extra Leg Room seats are generally located at the bulkhead, the front rows of the aircraft, and in Exit Rows. These seats provide an additional 4-6 inches of legroom.
Up Front seats are located towards the front of the aircraft and passengers seated in this area are the first to exit.