Cardboard Pocket Envelopes - Secure and Eco-Friendly Packaging for Your Documents

Cardboard Pocket Envelopes are a great solution for securely sending important documents, certificates, photos, prints, and more. These envelopes are made from strong corrugated board with micro-fluting for extra durability and protection during transit. Their expandable pocket-style design allows them to hold items up to 50mm thick, making them ideal for sending books, brochures, and other similar items securely. Whether you're a business sending contracts or a photographer shipping prints, these envelopes provide reliable protection with an eco-friendly, plastic-free design.

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Cardboard Pocket Envelopes – Capacity Postal Mailers | Pack Exact

Cardboard Pocket Envelopes

Pack thicker mailings—brochures, slim books, merchandise—with cardboard pocket envelopes that expand to fit contents, protect edges and speed up fulfilment with self-seal closures and tidy tear-open strips.

Explore related ranges: Postal Envelopes, All Board Envelopes (stay-flat), Cardboard Envelopes (category hub).

Need a box instead? Try ColomPac Fast Assembly Boxes for instant-bottom speed and a premium unboxing.

What are pocket envelopes?

Capacity pocket envelopes are rigid paperboard mailers with side gussets or scored panels that flex from 0–50 mm (typical), keeping multi-piece mailers compact while adding crush resistance and corner protection.

Why choose ours

Faster packing: peel-and-seal closures and optional tear strips reduce tape usage.

Better presentation: clean edges and consistent sizing elevate brand perception.

Recyclable: paper-based construction for simpler end-of-life.

Ideal uses

Brochures & catalogues: send sets without over-boxing.

Books & manuals: slim paperbacks, handbooks and guides.

Merch kits: tees, stationery, small textiles, brand packs.

Photo & art sets: add a cardboard sheet for extra rigidity.

International mail: self-seal + tear-open = better CX and fewer returns issues.

Archival: keep contents flat, labelled and easy to file.

How to choose the right pocket envelope

FootprintTypical capacityBest forTips
C5 (fits A5) 0–35 mm Invitations, slim brochures, stationery sets Keep under Large Letter where possible—watch thickness/weight
C4 (fits A4) 0–50 mm Magazines, manuals, product literature packs Add pads to stiffen delicate covers
A4+ 0–50 mm Book + merch combos, lookbooks, sample swatches Use bubble/paper at corners

If your contents are a single book or LP, a ColomPac Book Wrap may give better edge protection and adjustable depth.

How to pack in pocket envelopes

1) Format: choose C5/C4/A4+ to match item footprint + tolerances.

2) Pad: add a cardboard sheet for premium prints/covers.

3) Protect: use light paper or bubble at corners/spines.

4) Seal: press the self-seal; many lines include a tear strip for tidy opening.

5) Label: apply labels and attach paperwork with Documents Enclosed wallets.

Complete your postal pack

Postal & flat mailers

Postal Envelopes · All Board Envelopes · Book Wraps · Postal Tubes

Boxes

ColomPac Fast Assembly · Single Wall · Double Wall · Multi-Depth

Accessories

Cardboard Sheets · Protective Paper · Bubble Wrap · Labels · Documents Enclosed Wallets · Packing Tape

Cardboard Pocket Envelopes – Frequently Asked Questions

Pocket envelopes add capacity (typically 0–50 mm) for thicker sets. All-board stay-flat are rigid but 0 mm capacity—ideal for single flat items.

Choose a C4/A4+ footprint with enough depth for the stack. Keep below Large Letter thresholds if postage optimisation matters.

Yes—these are paper-based and widely recyclable. Remove non-paper extras before recycling.

For premium covers or photo sets, add a cardboard sheet and minimal paper or bubble at corners/spines.

For taller, heavier or mixed-SKU consignments, use ColomPac Fast Assembly Boxes or Double Wall Boxes.

Many lines include a tear-open strip for tidy opening and better customer experience; check the specific product details.


Why Choose Our Cardboard Pocket Envelopes?

  • Expandable Design: These envelopes expand up to 50mm in depth, making them perfect for shipping larger items like books, brochures, and certificates. They offer excellent versatility to fit a range of products.
  • Self-Adhesive Strip: The envelope comes with a convenient self-adhesive strip, allowing for quick and secure sealing without the need for tape or glue. This makes the packing process fast and efficient.
  • Perforated Tear Strip: For ease of use, the envelope features a perforated tear strip that makes it simple for recipients to open the envelope, ensuring a hassle-free unboxing experience.
  • Bend-Resistant: Made from strong, corrugated cardboard with micro-fluting, these envelopes provide excellent edge protection, preventing bending or creasing of documents and other contents during transit.
  • Eco-Friendly Packaging: These envelopes are a more rigid alternative to bubble envelopes and are plastic-free, making them an environmentally responsible packaging option. They are made from recyclable materials, further reducing environmental impact.
  • Elasticity Maintenance: The expandable gusset design helps to maintain elasticity and ensure that your products stay securely in place. However, when fully expanded, some width may be lost from the envelope, but the contents are still safely enclosed.

Shop Cardboard Pocket Envelopes in Various Sizes

  • A4 Cardboard Pocket Envelopes: Perfect for sending larger documents, certificates, and magazines. Provides ample space and sturdy protection for flat items.
  • A5 Cardboard Pocket Envelopes: Ideal for smaller documents, photos, and brochures. A great option for businesses that need to ship compact items securely.
  • A3 Cardboard Pocket Envelopes: Designed for oversized documents or prints. Perfect for sending large certificates or artwork securely.
  • Custom Cardboard Pocket Envelopes: We offer custom-sized cardboard pocket envelopes for businesses with specific packaging needs. Contact us to discuss your custom requirements.

Single Wall Boxes - FAQs and More

Why Cardboard Pocket Envelopes Are the Right Choice

Cardboard pocket envelopes are an excellent packaging choice for businesses looking to send documents, prints, photos, and other similar items securely. Their expandable design offers the flexibility to ship a variety of items, while their rigid construction provides superior protection against bending and damage during transit. Made from strong, recyclable cardboard, these envelopes are an eco-friendly option that helps reduce waste. They are easy to assemble and come with a self-adhesive strip for quick sealing. Whether you're sending contracts, certificates, artwork, or other flat items, our cardboard pocket envelopes provide the protection and convenience you need.

Frequently Asked Questions About Cardboard Pocket Envelopes

Cardboard pocket envelopes are made from high-quality corrugated cardboard with micro-fluting. This makes them durable and protective, ensuring that your items are safe from bending or creasing during transit.

We offer cardboard pocket envelopes in various sizes, including A4, A5, and A3. Custom sizes are also available for businesses with specific packaging needs. Contact us for more details on custom orders.

Yes, cardboard pocket envelopes are made from recyclable materials and are a plastic-free packaging option. They can be recycled after use, making them an environmentally friendly choice for your business.

Yes, cardboard pocket envelopes provide excellent protection for fragile items like photos, prints, and certificates. For additional protection, you can use bubble wrap or foam inserts inside the envelope to secure delicate items.

Cardboard pocket envelopes are supplied flat and can be easily folded along the pre-scored lines. Simply insert your documents or items, and seal the envelope using the self-adhesive strip. No tape or glue is required.

Yes, cardboard pocket envelopes are suitable for both domestic and international shipping. They are designed to meet postal regulations and provide secure protection for your items during transit.

Yes, we offer custom sizes and printing options for cardboard pocket envelopes. You can add your company logo or branding to the envelopes to create a professional look for your shipments. Contact us for more details on custom orders.