Description
Our C5 / A5 Plus Board Backed Envelopes (sometimes called C5+ / A5+ hard backed envelopes) are class-leading rigid mailers, designed specifically to accommodate slightly oversized documents and prints while offering robust protection in transit. These mailers combine a stiff backing board and quality paper shell to prevent bending, creasing or damage. This listing is for bulk orders, tailored to businesses, photographers, artists, printers, or mail houses needing consistent supply.
Key Specifications & Features
| Feature | Detail |
|---|---|
| Outer Dimensions | approx. 241 × 178 mm (≈ 9.5″ × 7″) |
| Construction | 120 gsm kraft / paper shell + 950 µm rigid board backing |
| Closure | Strong peel & seal adhesive for secure, tamper-resistant packing |
| “Do Not Bend” Marking | Front printed with “Please Do Not Bend” in red for handling awareness |
| Weight & Postage Note | ~35.1 g per envelope (bulk envelope weight) |
What You Can Send in a C5 / A5 Plus Board Backed Envelope
Because of the slightly larger format and rigid support, these envelopes allow for a broader range of items to be mailed safely:
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Full A5 prints, photographs, and art (unfolded)
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Folded A4 sheets / booklets with generous margin
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Large greeting cards, invitations, and announcements
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Certificates, awards, documents on board or matte
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Magazines, brochures, programs or promotional leaflets
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Collectible items, prints with mounts, or premium cards needing extra flat protection
The hard backed envelope structure ensures that delicate, flat, or semi-rigid items arrive crisp, unwarped, and professional in appearance.
Why Choose Bulk?
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Lower cost per unit — bulk ordering delivers significantly improved margins
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Reliable stock levels — avoid running out during large mail campaigns
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Uniform quality — all envelopes meet exact rigidity and finish standards
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Scalable mailing operations — you can pack and ship more efficiently
Customer Benefits & Use Cases
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Superior protection — the strong board core resists bending, so your contents survive rough postal handling.
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Professional presentation — these rigid mailers deliver items flat and untarnished, giving recipients a polished impression.
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Flexible size advantage — larger than standard C5, so you can send more without going up to full C4.
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Postal compatibility — though slightly oversized, many users still benefit from “large letter” or letter category rates (depending on weight and postal rules).
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High visibility messaging — the “Please Do Not Bend” print helps reduce mishandling during sorting.
