The current Mitsubishi Sigma is 4,800 mm long, 1,775 mm wide and 1,505 mm tall, on a 2,720 mm wheelbase. It has grown 5 cm longer since the 1991 Sigma.
| Years | Length | Width | Height | Wheelbase | Boot capacity | Turning circle |
|---|---|---|---|---|---|---|
| 1991–1996 | 4,750 | 1,775 | 1,435 | 2,720 | 420 | 11.2 |
| 1993–1996Current | 4,800 | 1,775 | 1,505 | 2,720 | 830 | 11.6 |
Exterior figures are manufacturer specifications for the Sigma, 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.