What is the length of the flag referred to?

The length of the flag referred to is known as the Fly. The "Fly" refers to the part of the flag that extends horizontally and is the portion opposite the hoist (the side where the flag is attached to the flagpole). In flag terminology, the Fly represents the dimension of the flag that is visible when it is flying in the wind, which visually distinguishes it from the Hoist (the height of the flag) and other components. Understanding flag dimensions, such as the Fly, is crucial for proper display, handling, and ceremonial use.