Mass Dynamic A5/C5 Large Letter Postal Boxes – Kraft Cardboard Mailer Boxes

Protect and present your products professionally with the Mass Dynamic A5/C5 Large Letter Postal Boxes. Made from strong 1mm corrugated kraft cardboard, these lightweight mailing boxes are ideal for online sellers, small businesses, fulfilment orders and personal postage.

Available in packs of 10, 25, 50 or 100 boxes, allowing you to select the right quantity for occasional posting or regular business use.

📦 Strong Corrugated Construction

Made from durable 1mm thick corrugated kraft cardboard, the boxes help protect contents against pressure, bending and minor impacts during handling and delivery.

📮 Large Letter Postal Design

The slim external dimensions are designed for Royal Mail Large Letter-compatible packaging, helping keep postage efficient when the completed parcel remains within the applicable size and weight limits.

⚡ Lightweight and Cost-Efficient

Each box weighs approximately 35g, providing protective packaging without adding excessive weight to your shipment.

🧰 Quick and Easy Assembly

The practical folding design allows each box to be assembled quickly. Secure the closed box with suitable packaging tape for a neat and professional finish.

📐 Space-Saving Storage

The boxes can be stored flat before use, helping reduce the amount of shelf, stockroom or workspace storage required.

🌿 Recyclable Kraft Cardboard

Made from kraft cardboard that can be recycled where suitable local recycling facilities are available, providing a practical alternative to unnecessary plastic packaging.

🏷️ Professional Kraft Finish

The natural kraft surface creates a clean, professional appearance and can be customised with labels, stamps, stickers or branded packaging tape.

📏 Product Specifications

• Brand: Mass Dynamic
• Product Type: Large Letter Postal Boxes
• Format: A5/C5 Style
• Material: Corrugated Kraft Cardboard
• Cardboard Thickness: Approx. 1mm
• External Size: 235 × 165 × 22mm
• Internal Size: 225 × 160 × 20mm
• External Dimensions: 23.5 × 16.5 × 2.2cm
• Weight: Approx. 35g per Box
• Pack Size Options: 10, 25, 50 or 100 Boxes
• Colour: Natural Kraft Brown
• Assembly: Foldable

⭐ Key Features

• Available in packs of 10, 25, 50 and 100
• Strong 1mm corrugated cardboard construction
• Slim Large Letter-compatible dimensions
• Lightweight design helps control postage weight
• Quick-fold construction for easy assembly
• Stores flat before use
• Recyclable kraft cardboard material
• Suitable for labels, stickers and business branding