Mailer boxes, also known as shipping boxes or postage boxes, are sturdy and customizable packaging solutions designed to securely transport and protect various items during shipping. These boxes are typically made from corrugated cardboard and come in various sizes and shapes to accommodate different products. Mailer boxes are often used by businesses for e-commerce shipments and can be customized with branding, logos, and additional features like inserts or padding to enhance the unboxing experience.