The current Smart roadster is 3,427 mm long, 1,615 mm wide and 1,191 mm tall, on a 2,360 mm wheelbase.
Only one generation of this model is in our catalogue, so there is no size history to compare yet.
Exterior figures are manufacturer specifications for the roadster, 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.