An overview of global compact car classifications and size standards, highlighting regional differences and market significance. Compact vehicles are vital for urban mobility, with key dimensions and classifications detailed across different markets.

Compact vehicles occupy a unique spot in the automotive market, sitting between smaller subcompact cars and larger mid-size options. In the United Kingdom, they are commonly referred to as family vehicles, while in Europe, they are categorized within the C-segment. According to the U.S. Environmental Protection Agency (EPA), compact hatchbacks usually measure around 4,100 mm (161 inches) in length, with international standards slightly larger at approximately 4,450 mm (175 inches). Size specifications vary across regions, influenced by vehicle types such as sedans, convertibles, SUVs, and MPVs, each with defined dimensional ranges. Japan's classifications also specify limits in length, width, and engine capacity, aligning with regional standards. These variations illustrate how compact vehicle classifications differ globally, yet maintain similar size ranges ideal for city commuting and family transportation. In the U.S., compact cars account for roughly 16% of the market, mainly comprising imported models, with wheelbases typically spanning 100 to 109 inches (2,540-2,769 mm).