Big city is a subclass of city/town. Big city nexts higher rank city with millions of inhabitants. Big city nexts lower rank town. New York City is a big city. Libreville is a big city. Chemnitz is a big city. Rijeka is a big city.

Cagayan de Oro is a big city. Girona is a big city. Tabaco is a big city. Ligao is a big city. San Francisco is a big city. Split is a big city.

City with millions of inhabitants is a subclass of big city. City with millions of inhabitants nexts lower rank big city. Legazpi is a big city. Bayugan is a big city.