Ultra-Slim Large Letter Compliance – 310x220x16mm superflat design meets postal standards for A4 documents, catalogs, or photo albums, qualifying for affordable large letter rates while avoiding parcel fees.

Reinforced Superflat Durability – 2.8mm FSC-certified corrugated walls withstand 12kg/cm² crush resistance, protecting delicate items like vinyl records, certificates, or thin electronics in transit.

Self-Locking No-Tape Assembly – Precision die-cut slots and foldable flaps enable 5-second secure sealing, streamlining workflows for offices, print shops, or e-commerce sellers

100% Recyclable & Eco-Certified – Bleach-free white kraft material is fully recyclable and plastic-free, aligning with sustainability goals for green businesses, schools, or eco-conscious brands.

Bulk-Order Assurance & Warranty – Includes 2-year quality guarantee, volume discounts, and split shipments for publishers, photographers, or startups scaling mailing operations.

The Superflat White Mailing Box 310x220x16mm is a premium, postal-optimized solution designed for businesses and individuals prioritizing cost-efficiency, durability, and sustainability. Its ultra-slim 16mm profile complies with large letter postal standards, allowing seamless shipping of A4 documents, catalogs, photo albums, and flat items without incurring costly parcel fees. Ideal for offices, e-commerce sellers, and creative professionals, this box ensures your items arrive securely while maximizing shipping cost savings.

Constructed from 2.8mm FSC-certified corrugated kraft board, this mailing box delivers exceptional protection despite its slim design. With a crush resistance of 12kg/cm², it safeguards delicate items like vinyl records, certificates, or thin electronics from bending, crushing, or moisture damage during transit. The bright white finish offers a polished, professional appearance, enhancing unboxing experiences for brands focused on premium presentation.

The innovative self-locking design eliminates the need for tape or glue. Precision die-cut slots and foldable flaps enable secure assembly in just 5 seconds, streamlining workflows for high-volume shippers, print shops, or photographers managing bulk orders. This feature reduces packaging time and labor costs, making it a favorite among efficiency-driven businesses.

Sustainability is central to this product. Made from 100% recyclable, bleach-free kraft paper, it aligns with eco-conscious initiatives for schools, green corporations, and zero-waste brands. The smooth white surface is ready for custom branding, QR codes, or eco-labels, empowering businesses to reinforce their commitment to sustainability while maintaining a professional image.

Backed by a 2-year quality guarantee, this mailing box supports scalable operations with flexible bulk-order solutions. Volume discounts and split shipments cater to publishers, photographers, or startups managing seasonal demand or rapid growth. Trust this eco-friendly, durable, and cost-effective solution to elevate your shipping strategy while reducing environmental impact.