The product is a set of 100 poly mailers shipping envelopes, specifically measuring 10" x 13". These self-sealing plastic mailing bags are designed for easy and secure shipping, perfect for businesses and individuals looking to efficiently send packages. The white color adds a professional touch to any mailing, while the convenient self-sealing feature ensures quick and hassle-free shipment preparation. Made for packaging and shipping needs, these poly mailers are a practical and reliable option for sending items through the mail.