1 / 7Orion Stationery C4 Board-Backed Kraft Envelopes, 50 Pack
Pack: Orion Stationery C4 Hard Back Board Kraft Envelopes are brown, self-seal mailing envelopes intended for unfolded A4 papers and other flat documents. Their board-backed construction is designed to help keep contents flat, while the peel-and-seal strip avoids the need for separate tape or moisture.
At a glance
- C4 dimensions are listed as 324 × 229 mm, for A4 sheets sent unfolded.
- Board-backed construction and a rigid cardboard insert are intended to help keep documents flat in transit.
- Peel-and-seal closure is designed for sealing without moisture, glue or tape.
- The listing describes the paper as recyclable and plastic-free.
Often bought together
Pros and cons
Pros
- Board backing is a useful fit for certificates, photographs and paperwork that should remain flat.
- Self-adhesive peel-and-seal closure makes preparation straightforward without separate sealing materials.
- The 50-pack format suits regular office or business mailing.
Technical specifications
10 specifications| Brand | Orion Stationery |
|---|---|
| Model | C4 Hard Back Board Kraft Envelopes |
| Size | C4 |
| Colour | Brown |
| Envelope dimensions | 32.4L x 22.9W centimetres |
|---|---|
| Material listed | Cardboard, Paper |
| Thickness | 90 GSM |
| Closure | Self-Seal |
|---|---|
| Pack quantity | 50 |
| Special features | Board-backed, Kraft Paper Construction, Peel And Seal Closure, Please Do Not Bend, Rigid Back |
What to know before buying
Listing details to confirm
The listing presents the dimensions as 324 × 229 mm and 32.4L x 22.9W centimetres, which are consistent. Thickness is stated as 90 GSM, a paper weight figure rather than a measurement of envelope depth. The claim of tamper-resistant closure is not accompanied by a security standard or test details.
Who is it for?
A good fit for
- People mailing unfolded A4 documents, certificates, photographs or flat printed materials.
- Offices and small businesses seeking a multipack of self-seal, board-backed envelopes.
Less suited to
- People who need expandable capacity for bulky or thick contents. The listing describes a flat, board-backed envelope and gives no gusset measurement.

Customer reviews on Amazon
- 5 stars
71% 71% - 4 stars
0% 0% - 3 stars
11% 11% - 2 stars
0% 0% - 1 star
18% 18%
Only aggregate rating information is supplied, with no written customer feedback to identify specific strengths, concerns or reasons for ratings. The distribution is mostly five-star but includes three-star and one-star ratings, so experiences appear mixed. These figures cannot establish how well the board backing or seal performs for a particular mailing need.
Frequently asked questions
Will these envelopes take A4 sheets without folding?
The listing identifies them as C4 and recommends them for sending A4 papers unfolded. It gives envelope dimensions of 324 × 229 mm.
How are the envelopes sealed?
They have a self-adhesive peel-and-seal strip, which the listing says requires no moisture, glue or tape.
What protection does the backing provide?
The manufacturer describes a rigid board-backed construction intended to help keep documents flat during transit. It is not presented as a guarantee against all transit damage.
How many envelopes are included?
The listing specifies a pack of 50.

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