Seat has revealed the images of the Mii, which will be the new entry-level hatchback for the company. Seat has now added rear doors to the Mii - to add the five-door option. The five-door Mii's length remains unchanged at 3.56 metres and so does the boot capacity as it can still swallow 251 litres of luggage and 951 litres when the rear seats are folded.