These Poly Mailers Bags help ensure that items reach their destinations in tact and dry irrespective of the weather conditions outside. They feature self-sealing strips for easy closure and added security when mailing or shipping. The high strength seams allow for over-stuffing without tearing. These lightweight poly envelopes are white on the outer surface with a black inner lining for enhanced privacy. They come in a pack of 200 and measure 6 x 9 each.