C3 / A3 Board Backed Envelopes (457 × 324 mm approx) — Bulk Rigid Mailers x 8300

C3 / A3 Board Backed Envelopes (457 × 324 mm approx) — Bulk Rigid Mailers x 8300

£1,242.00 Inc VAT: £1,490.40

SKU: BBENV-C3-BR#8300 Categories: ,

Description

Send your largest flat prints and documents with confidence using our C3 / A3 board backed envelopes — sturdy hard backed envelopes designed to protect oversized items without folding. This listing is for bulk quantities, making it perfect for galleries, architects, print shops, artists, or any business mailing large-format content at volume.

Key Features & Construction

  • Outer Dimensions: 457 × 324 mm (approx 18″ × 12.75″) — large enough to fit A3 or C3-sized items flat.

  • Rigid Board Core: Reinforced board backing resists bending, giving outstanding protection in transit.

  • “Please Do Not Bend” Print: Each envelope is printed with red handling instructions to discourage mishandling.

  • Bulk Options: Offered in multiple quantity tiers (from 10 up to 2,000 units) to suit small and large mail runs alike.

  • UK Manufactured & Recyclable: Made domestically with recycled and recyclable materials.

What Fits Inside & Use Cases

Thanks to its generous size and rigid build, these envelopes are ideal for flat items such as:

  • A3 prints, posters, artwork, drawings (no folding required)

  • Large mounted photographs or giclée prints (within thickness constraints)

  • Architectural plans, maps, renderings

  • Portfolios, presentation sheets, large certificates

  • Brochures, booklets or promotional packs sized A3 or multi-sheet layouts

The board backing ensures your content stays flat and intact — no bending, curling, or postal creasing.

Why Buy in Bulk

  1. Lower unit cost — ordering in higher quantities reduces your per-piece cost

  2. Reliable stock levels — always have envelopes ready for large output runs

  3. Quality consistency — each unit is produced to the same rigid standards

  4. Fulfillment efficiency — streamline packing, storage, and dispatch for high-volume operations

Benefits to Your Business & Recipients

  • Superior protection: The hard backed construction keeps prints and documents safe from damage.

  • Professional presentation: Items arrive flat and pristine, reinforcing your brand image.

  • Large-format capability: Enables mailing of A3 or equivalent items without the need for tubes.

  • Scalability: Ideal for businesses with recurring large-format mailing needs.

  • Eco and UK-friendly: Manufactured in the UK, using recyclable materials, reducing import footprint.

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