The current Austin Metro is 3,403 mm long, 1,555 mm wide and 1,373 mm tall, on a 2,251 mm wheelbase.
| Years | Length | Width | Height | Wheelbase | Boot capacity | Turning circle |
|---|---|---|---|---|---|---|
| 1981–1985 | 3,400 | 1,540 | 1,350 | 2,250 | 212 | 10.2 |
| 1985–1990Current | 3,403 | 1,555 | 1,373 | 2,251 | 229 | 10.2 |
Exterior figures are manufacturer specifications for the Metro, 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.