The current Lexus GS is 4,884 mm long, 1,841 mm wide and 1,449 mm tall, on a 2,850 mm wheelbase.
| Years | Length | Width | Height | Wheelbase | Boot capacity | Turning circle |
|---|---|---|---|---|---|---|
| 1993–1997 | 4,965 | 1,795 | 1,425 | 2,780 | 404 | 11.0 |
| 1997–2005 | 4,805 | 1,800 | 1,445 | 2,800 | 515 | 11.0 |
| 2005–2012 | 4,825 | 1,815 | 1,430 | 2,850 | 374 | 10.4 |
| 2012–2016 | 4,850 | 1,840 | 1,455 | 2,850 | 458 | 10.5 |
| 2016–2018Current | 4,884 | 1,841 | 1,449 | 2,850 | 465 | 10.6 |
Exterior figures are manufacturer specifications for the GS, 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.