The two categories of airspace are: regulatory and nonregulatory. Within these two categories, there are four types: controlled, uncontrolled, special use, and other airspace. The categories and types of airspace are dictated by the complexity or density of aircraft movements, nature of the operations conducted within the airspace, the level of safety required, and national and public interest. Figure presents a profile view of the dimensions of various classes of airspace.

Pilot aeronautical knowledge
Airspace profile

Also, there are excerpts from sectional charts that are discussed in Navigation section, that are used to illustrate how airspace is depicted.