An Airbus has a single aisle with either two or three seats on each side; economy cabins generally have three seats on either side of the aisle. As of 2015, an Airbus A320 typically carries 150 passengers, with some planes carrying 180 passengers. Twelve seats are designated first class cabin seats.
The right-sized fuselage of the Airbus A320 is 7 inches wider than most other airplanes, notes the company's official website. This allows the plane to have more space in overhead storage, wider seats and wider aisles. A320 Planes can be in row configurations of four, five or six seats, depending on the cabin class.
One A320 premium family seating configuration has three row seats on one side and two row seats on the other side of the aisle. Each seat is 19 inches wide and the aisle is 23 inches wide. Another configuration, generally used for first class seating, has two seats that are 22.6 inches wide each on either side of a 29-inch wide aisle.
The Airbus A320 has two economy class configuration options. One has a 25-inch aisle with three row seats on either side. The seats are 17 inches wide. The larger seat configuration has three seats, each 18 inches wide, on either side of a 19-inch aisle.