The D-segment is the 4th category of the European segments for passenger cars, and is described as "large cars".[1][2]
It is equivalent to the Euro NCAP "large family car" size class,[3] and the present-day definition of the mid-size car category used in North America.[4][5] Compact executive cars are part of the D-segment size category.
D-segment sales represent approximately 7% of the market in 2010s. [6] [7]
exact market definition was left open .. boundaries between segments are blurred by factors other than the size or length of cars