Postal (3 9/16" x 5 5/16") laminating pouches are clear, durable sleeves designed to protect and enhance postal documents, mailing labels, and similar-sized materials. Measuring 3.56 by 5.31 inches, these pouches provide excellent resistance to moisture, tearing, and everyday wear while offering a professional glossy or matte finish. Compatible with most thermal laminators, postal laminating pouches help preserve important mailing information and improve durability, making them ideal for mailrooms, offices, and shipping departments seeking reliable, long-lasting protection.