The F-segment is the 6th category and largest of the European segments for passenger cars, and always belongs to "luxury cars". The equivalent categories are full-size luxury sedan (or "large luxury sedan") in the United States, luxury saloon (or "luxury limousine") in the United Kingdom, and Oberklasse in Germany. F-segment is a niche of the European market (approx. 0.2%-0.3% in 2010s) and the range is limited to only a few models.