4 seats per row Standard sightseeing buses with 2 seats on either side of the central aisle, usually with 11 rows of seats.
4 extra-legroom seats per row With 9 or 10 rows of seats compared to the usual 11, these buses create extra legroom for each passenger.
3 seats per row Buses with a pair of seats and a single seat per row, creating extra width for each seat. Usually with 9 or 10 rows.
3 individual seats per row 3 seats per row each separated by an aisle. Usually with between 8 to 10 rows of seats.
2 seats per row These buses offer the most luxurious design with only 2 seats per row.