Oversized 5-Tab 12&rdquo;x18&rdquo; (ARCH B) File Folders (Black) Oversized folders for organizing documents, drawings, and artwork up to 12x18 Made from heavy duty 18pt poster board material for long-lasting durability 5-tabs for better organization and retrieval Pleated folder design to expand with project needs Overall dimensions: 18.25 wide, 13.00 tall.