Urban scale refers to the different spatial levels at which the city is organized and analyzed, ranging from the street and public space to the neighborhood, district, or system of cities within a territory. Understanding urban scales allows for a comprehensive approach to urban processes, recognizing how design, planning, and management decisions influence the form and functioning of the built environment and the everyday life of its inhabitants.
Kevin Lynch. (1981). A theory of good city form. Cambridge, MA: MIT Press.