The B-segment is the second smallest of the European segments for passenger cars between the A-segment and C-segment, and commonly described as "small cars".[1][2][3] The B-segment is the largest segment in Europe by volume, accounting for 20 percent of total car sales in 2020 according to JATO Dynamics.[4] B-segment cars include hatchback, saloon, estate, coupe/convertible, MPV, and crossover/SUV body styles.[5][6]
exact market definition was left open .. boundaries between segments are blurred by factors other than the size or length of cars