These sheet protectors are pretty slick! A fellow vendor friend wanted me to get these since he uses them, so here they are! This is a clear, heavyweight polypropylene sheet protector that folds out, expanding to fit sheets up to 11 x 17 . The folder is center loading, making it easier to insert sheets. Use for large maps, newspaper articles, large census records, virtually anything that is large and foldable. They are 3-hole punched for inserting into a notebook. You gotta love these! Click for another view. Sold per piece.