JAM Paper & Envelope s Large Square Button & String Closure Envelopes all a sophisticated two tone look. These envelopes are a great product to use if you re looking to get more organized at the house, office, or classroom. These envelopes are made from flexible plastic, measure 13 x 13 inches, have a 1-inch expansion, feature a button and poly string closure ensuring your items stay safe and secure, and are water, scratch, and tear resistant. These envelopes are great to help you organize large and standard documents such as forms, memos, marketing materials, presentation preparations, letters and and anything smaller. Their size makes them even more practial; they easily fit in filing cabinets, desk organizers, drawers, and shelves, and can be taken on the go, easily fitting into bags or briefcases. This large square plastic envelope comes in the color Metallic Charcoal Blue. Available in a wide variety of colors and sizes.