18x24 Art Portfolio Folder: Include 1 pack presentation book with 30 top-loading plastic sleeves which display on two sides, letting you show 60 pages. Folder measures 25 1/4" (L) x 19 1/4" (W) x 1 1/8" (H). It fits 18.35 x 24" letter size or smaller. Made from durable polypropylene which is archival quality, acid-free, non-stick, and non-glare, and provides long-term storage protection for your documents or artwork. Black inner sheets: Each sleeve has a black inner sheet which makes for a great background if your inserted art is smaller than 18" x 24". Not only make your important document flat and wrinkle-free but also let you insert or remove the files fast and easily no matter how often you change the pages.