When you can't or shouldn't fold the contents, here's the professional way to send flat but bulky materials- pamphlets, brochures, sales literature, booklets, annual reports, magazines, or catalogs. The flap, usually rectangular in shape, is on the long side for easier filling. 16 sizes in kraft, white and an array of colors to suit your style. Available with moistenable flap, some with self-stick Peel & Seal®. Also see our Open End selection.