A brochure is a fantastic method to provide potential customers with more specific information about your business, project, event, location, or idea.. Our brochures are identified by their final size (after folding), and the PP indicates the number of printed panels left after folding. A double-sided panel has two pages. An A4 may be magically transformed into a 4pp A5 brochure by folding it in half. An A4 folded in thirds creates a 6-page DL brochure that is also known as a “tri fold” (we know, there are only two folds, but that’s the lingo!).