Brochures come in four standard sizes, 8-1/2x11, 8-1/2x14, 11x17 and 11x25-1/2. An unfolded 8-1/2x11 is often used for product sheets, or tri-folded for a company brochure. Many companies use an 11x17 brochure, folded in half, as an economical product catalog. You can also use half- or third-cut sheets, to help promote your business in a “stuffer” or hand out campaign.