The current Lexus IS is 4,665 mm long, 1,810 mm wide and 1,430 mm tall, on a 2,800 mm wheelbase. It has grown 27 cm longer since the 1999 IS.
| Years | Length | Width | Height | Wheelbase | Boot capacity | Turning circle |
|---|---|---|---|---|---|---|
| 1999–2005 | 4,400 | 1,725 | 1,420 | 2,670 | 400 | 10.2 |
| 2001–2005 | 4,505 | 1,725 | 1,430 | 2,670 | 343 | 10.2 |
| 2005–2013 | 4,580 | 1,801 | 1,437 | 2,730 | 378 | 10.2 |
| 2013–2021Current | 4,665 | 1,810 | 1,430 | 2,800 | 450 | 10.4 |
The Lexus IS offers 840 mm of rear legroom and 870 mm of rear headroom, with 1,140 mm of legroom and 940 mm of headroom up front. Rear shoulder room measures 1,500 mm across.
| Front | Rear | |
|---|---|---|
| Legroom | 1,140 mm | 840 mm |
| Headroom | 940 mm | 870 mm |
| Shoulder room | 1,510 mm | 1,500 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 IS, 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.