What’s Included: The package includes 100 unpadded poly mailers measuring 10x13 inches. These durable mailers are ideal for shipping various non-fragile items like T-shirts, jeans, small stuffed animals, hats, and mittens. With a dark interior lining, our multi-layer bags ensure complete privacy during shipping. Easy Peel and Seal: This poly mailer features a peel away plastic strip that allows for quick and secure sealing. The adhesive strip is permanent and cannot be opened once sealed, ensuring the utmost security for your package. Lightweight and Durable: Crafted with quality and durability in mind, these poly mailers are constructed from low density polyethylene material with a thickness of 2 mil on one side. Perfect for small businesses, these bags are both lightweight and stylish, offering a wide selection of designs to spark inspiration for your mailings. Optimal for Small Businesses: With a range of sizes and designs, our shipping envelopes are the ideal option for small business packaging and shipping. Size Selection: To accurately determine the size of your product, take into consideration its thickness. When measuring width, add the product's width, thickness, and ½ inch. For length, add the product's length, thickness, and 1 inch. Remember, the thickness of your product is a key factor in determining size of bag you need. (100) 10x13" Standard Size Premium Designer Printed Boutique Shipping Mailers.