Custom corrugated mailer boxes are designed for secure shipping of products that require extra protection during transit. Their rigid corrugated structure helps absorb impact and pressure, making them suitable for e-commerce orders, subscription boxes, and retail shipments. These mailers can be customized in size, flute strength, and opening style to match different product needs. Self-locking designs and reinforced edges improve durability and reduce the need for additional packing materials. During structural planning at The Boxes Co., corrugated mailers are developed to balance protection, ease of packing, and a clean presentation that works well for both shipping and customer unboxing.