Poly Mailers Shipping Bags Envelopes Premium Bag is a set of self-sealing, peel n seal poly mailer bags used for shipping. The set includes five different sizes: 6x9, 7.5x10.5, 9x12, 10x13, 12x15.5, 4.5x19 and 19x24 inches. The bags are made by POLYSELLS and are shipped daily from China. They are suitable for various shipping needs and are easy to use. The interior dimensions of the bags are provided for accurate sizing.