JAM Paper® Dark Blue Letter Open End Plastic Envelopes with VELCRO® Brand Closure are 9.75 x 11.75 inches in size, have a one inch expansion, and are ideal for storing both documents and small office supplies. In this pack of 12, each envelope is made out of tough and tear-proof, yet flexible plastic and has a straight flap opening. Their certified VELCRO® Brand closures ensure that they stay closed tightly and can be opened easily. Their deep blue color combines professionalism with a hint of self expression. Use them to protect your documents from bending, ripping, crumpling, stains, markings, and other damage.