For such a small car, the Mii is certainly spacious in the front. There’s lots of head- and leg room for tall adults, and plenty of room for elbows, too.
Storage space is good, with wide, deep door pockets and a single cupholder located centrally below the dashboard. A small shelf dividing an open-faced cubbyhole is another practical touch.
The Mii’s glovebox provides enough room for the car’s manual and the removable infotainment system, but not much else.
Seat Mii rear space
The boxy dimensions mean the roof doesn’t taper and the rear of the car stays nearly the same width as the front. As a result, rear head- and shoulder-room are decent. Leg room is tight for adults, though, especially if they’re sitting behind someone tall. If you regularly carry rear-seat passengers, a Hyundai i10 is a roomier choice.
Access in the five-door Mii is good, although it’s more of a squeeze in the three-door version.
Each rear passenger gets a well-placed door armrest and a cupholder.
Seat Mii seating flexibility
The Mii’s rear seatbacks fold flat as one piece if you opt for the entry-level S version, but Ecomotive models upwards get 60/40 split-folding rear seats as standard.
Unfortunately, a height-adjustable passenger seat isn’t available on any model, and there’s no option of a folding passenger seat for when you want to carry extra-long items.
Seat Mii boot space
Boot space is generous; in fact, the Mii has one of the biggest boots in the city car class. Unfortunately, there’s no option to add a height-adjustable boot floor, allowing you to keep fragile items safely stowed away below a solid removable floor. That’s a curious omission since this feature is available on the Mii’s sister car, the VW Up.
Annoyingly, the parcel shelf isn’t attached to the tailgate, either, so it has to be raised and lowered manually.
There’s no wheelarch intrusion, so the boot floor is a nice square shape, although there is a bit of a drop from the boot lip to it. There’s also a large step in the floor when the rear seats are folded down, although there is more space than in some cars from the class above.