The current Lexus RX is 4,890 mm long, 1,920 mm wide and 1,695 mm tall, on a 2,850 mm wheelbase. It has grown 31 cm longer since the 2000 RX.
| Years | Length | Width | Height | Wheelbase | Boot capacity | Turning circle |
|---|---|---|---|---|---|---|
| 2000–2003 | 4,580 | 1,815 | 1,660 | 2,615 | 489 | 12.2 |
| 2003–2009 | 4,746 | 1,845 | 1,674 | 2,715 | 439 | 12.2 |
| 2009–2015 | 4,770 | 1,885 | 1,685 | 2,740 | 496 | 11.4 |
| 2015–2023 | 4,934 | 1,895 | 1,685 | 2,790 | 342 | 11.8 |
| 2023–presentCurrent | 4,890 | 1,920 | 1,695 | 2,850 | — | 12.6 |
Exterior figures are manufacturer specifications for the RX, 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.