The current Cadillac STS is 4,985 mm long, 1,843 mm wide and 1,464 mm tall, on a 2,957 mm wheelbase.
Only one generation of this model is in our catalogue, so there is no size history to compare yet.
The Cadillac STS offers 900 mm of rear legroom and 935 mm of rear headroom, with 1,160 mm of legroom and 1,010 mm of headroom up front. Rear shoulder room measures 1,505 mm across.
| Front | Rear | |
|---|---|---|
| Legroom | 1,160 mm | 900 mm |
| Headroom | 1,010 mm | 935 mm |
| Shoulder room | 1,510 mm | 1,505 mm |
Interior figures are the roomiest measurement (seat fully back), taken as the median across the current generation’s variants; individual trims vary.
Exterior figures are manufacturer specifications for the STS, 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.