Many blue poly folders are 3-hole punched or include a 3-ring–compatible hole so they can be stored directly in standard binders.
Some blue poly folders are described as heavy-duty, tear-resistant, and water-resistant. Features noted include sealed material edges and stress-guard notched pockets to help prevent tearing and extend lifespan.
Many blue poly folders accommodate standard letter-size paper (8.5" x 11"). Typical folder dimensions for letter-size options are about 11.5" x 9.5" (some listings show similar measurements like 11.34" x 9.37").
Blue poly folders are typically made from materials such as polypropylene or polyurethane; some listings also use generic 'plastic' in the product details.
Sheet capacities listed range from about 25 sheets up to 100 sheets, with common capacities shown as 25, 50, 75, and 100 sheets depending on the style.
