OOH glossary · Formats
Extension (cutout)
An extension is a cutout piece that sticks out past the normal edge of a billboard face.
OAAA defines an extension as a cutout area of copy outside the normal frame. Embellishments are related extras: added letters, figures, moving parts or lights.
Extensions help a board stand out, but they cost more to build and hang. They change the sign’s size, so they may need permit approval too.