Self-adhesive C4 Mailer envelope MAILmedia 383848 — 90 g/m², grey

MAILmedia Self-adhesive C4 Mailer envelope (90 g/m², grey) is a paper mailing envelope sized to hold A4 documents flat without folding. Constructed from 90 g/m² grey paper, this C4 mailer provides a balance of stiffness and flexibility to protect letters, brochures and single-sheet prints during handling and transit. The envelope uses a peel-and-seal adhesive strip for quick closure and a neat, tamper-evident finish suitable for business correspondence and professional mailings.

Advantages

The 90 g/m² paper offers reliable protection while remaining lightweight for cost-effective postage. The peel-and-seal closure allows fast, single-step sealing without additional tape or glue, reducing packing time. Grey paper gives a neutral, professional appearance and hides minor scuffs during handling. The C4 format accommodates A4 documents flat, eliminating creases and preserving presentation quality.

Suitable for

• Sending A4 invoices, contracts and official letters without folding
• Mailing brochures, certificates and single-sheet prints that require a flat presentation
• Office and administrative mailing tasks with moderate handling requirements
• Small print shops and businesses preparing mailshots or client documents

Key specifications

• Material: paper, grey
• Paper weight: 90 g/m²
• Format: C4 (fits A4 documents flat)
• Closure type: peel-and-seal adhesive strip
• Finish: matt surface

How to use

Insert A4 documents flat into the C4 mailer so that contents sit evenly without bending. Remove the protective strip covering the adhesive, fold the flap down and press firmly along the closure to ensure full contact and a secure seal. For additional protection, consider placing fragile or valuable items inside a protective sleeve before inserting into the envelope. Store unused mailers in a dry place to preserve paper quality and adhesive performance.

Recommendations

For reliable presentation and delivery, use the MAILmedia C4 mailer for single-sheet or stapled A4 documents. Avoid overfilling beyond the envelope capacity; when sending heavy or bulky items, choose a padded or rigid alternative. Keep mailers away from heat and moisture before use to maintain adhesive strength and paper integrity.