Begin with the information job.
A focused brand introduction, a service explanation, an event programme, a product range and a long-term reference all ask different things of the reader. Write down the moment of use: a sales meeting, an in-store handout, a mailed pack, a visitor guide, a trade appointment or a take-away reference. This gives you a more useful starting point than choosing a product name from a list.
Use a brochure when the message needs a guided story.
A brochure can work well when the reader should move through a clear sequence: a need, an offer, evidence, examples and a next step. It may be compact or substantial; the defining feature is the curated narrative. Plan the opening spread, the order of key messages, photography, proof points, contact route and the point at which the reader is asked to act.
Use a booklet when structured reference matters.
A booklet can be useful for programmes, guides, menus, training material, instructions or multi-part information that readers return to. Navigation matters here: contents, headings, page numbers, dividers, icon keys and clear section changes can make the information easier to find. Page count alone does not decide the label; density, reading pattern and how often the material changes are more useful tests.
Use a catalogue when comparison and range navigation matter.
A catalogue, sometimes spelled catalog, is usually organised around browsing a collection or comparing options. It may need categories, product identifiers, variants, specifications, images, pricing placeholders, ordering context or routes between related products. The layout should help readers scan and compare without losing the hierarchy of the overall range.
Choose a leaflet or poster when the message is shorter and more immediate.
If the reader only needs one urgent message, a date, a promotion or a quick point of contact, a leaflet or poster may be a better route than forcing the content into a booklet. A hybrid can also work: a focused business story alongside a small, carefully structured range. The decision should follow the reader’s task and the expected life of the information, not a rigid page-count rule.