The current Mazda 6 is 4,800 mm long, 1,840 mm wide and 1,480 mm tall, on a 2,750 mm wheelbase. It has grown 11 cm longer since the 2002 6.
| Years | Length | Width | Height | Wheelbase | Boot capacity | Turning circle |
|---|---|---|---|---|---|---|
| 2002–2005 | 4,690 | 1,780 | 1,450 | 2,675 | 505 | 11.8 |
| 2005–2007 | 4,710 | 1,780 | 1,480 | 2,675 | 505 | 10.8 |
| 2008–2012 | 4,785 | 1,795 | 1,490 | 2,725 | 519 | 10.8 |
| 2012–2024Current | 4,800 | 1,840 | 1,480 | 2,750 | 522 | 11.8 |
Exterior figures are manufacturer specifications for the 6, averaged per generation across its variants and shown for the most common body style. Generations with the same size are merged. Boot capacity is the seats-up figure where the manufacturer quotes one.