Tigerair Australia flies their 737-800 in a 180 seat capacity with 42 'Extra Leg Room' seats, 30 'Up Front' seats and 108 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.