Self-adhesive Mailing Bags MAILmedia B4 Brown 23.2 g – padded postal envelopes for documents

MAILmedia B4 Brown 23.2 g self-adhesive mailing bags are brown padded postal envelopes designed to carry and protect B4-format documents and other flat items during shipment. Each envelope is lightweight at 23.2 g and includes an integrated self-seal strip for quick, tool-free closure. The padded interior helps reduce bending and minor impact damage while keeping handling simple for e‑commerce orders, office mailings and archival transfers.

Advantages

The self-adhesive closure enables fast and secure sealing without tape or additional tools, saving time in packing workflows. The brown outer layer provides a neutral, professional appearance while the padded inner layer adds a measure of protection against bending and abrasion. At 23.2 g per envelope these mailing bags keep postage costs low compared with heavier packaging and are disposable for straightforward returns or one-way shipments.

Suitable for

• Mailing and protecting B4 documents such as certificates, brochures and magazines
• Sending flat retail items from e‑commerce stores
• Office internal and external correspondence where light cushioning is sufficient
• Archival transfers of paperwork requiring protection from folding or surface damage

Key specifications

• Format: sized for B4 contents
• Weight per envelope: 23.2 g
• Color: brown
• Closure type: integrated self-adhesive strip
• Construction: padded interior for light cushioning
• Intended use: single-use disposable mailing bag

How to use

Insert documents or flat items into the envelope so they lie flat against the padded layer. Remove the protective liner from the self-adhesive strip and press the flap firmly along the full length to ensure a consistent seal. For heavier or sharper items, consider additional internal protection or using a higher-strength parcel. Label the outer surface as required for postal services and handle according to carrier requirements.

Recommendations

Use these MAILmedia B4 padded mailing bags for single-item shipments and document deliveries where light cushioning is sufficient; avoid using them for heavy, irregular or sharp objects without additional protection. Store envelopes in a dry environment to maintain adhesive performance and ensure accurate postage by weighing a representative sample if exact rates are needed.