Self-seal with an easy opening strip
This rigid mailer posts documents, files, DVDs, books and other flat items without bending or tearing. The 400gsm solid board gives the envelope structure and resists punctures, while the short edge opening expands up to 30mm in height for thicker flat contents. The small edge opening allows items to slid in straight from the top of these rigid mailer envelopes, suiting items like catalogues, legal contracts or certificates. A peel-off self-adhesive strip seals it without tape, and a built-in tear-off strip lets the recipient open it cleanly without cutting the contents. Available in six sizes from 170 x 245mm up to 310 x 445mm (opening width x internal height). The board is made from 100% recycled material and is 100% recyclable. The packs arrive sealed in boxes to keep them clean before use.
Sold and priced per pack. Quantity discounts apply on three or more packs.
Where does the rigid mailer work best?
The rigid mailer suits postal and e-commerce teams sending flat items that must stay uncreased, with quick sealing and clean opening at the customer end.
- Documents and files, where 400gsm solid board keeps paperwork flat and guards against punctures and tearing.
- Books and catalogues, where the height expands up to 30mm for thicker flat contents.
- DVDs and media, where rigid mailer envelopes resist bending during handling and sorting.
- Small flat e-commerce orders, where a small rigid mailer gives a tidy pack without void fill.
- For fragile or single documents small edge openings are the safer option as it acts as a stiff pocket.
Not for
- Fragile, bulky or impact-sensitive items. Use a cardboard box where contents need space for cushioning and edge protection.
- Soft goods that do not need board rigidity. Use Mailing bags where flexibility matters more.
- Liquids, powders or items that can leak. Use sealed primary packaging before any postal outer.
Specifications
- Colour: brown
- Material: flat carton, solid board
- Board weight: 400gsm
- Opening: short edge
- Height adjustment: expands up to 30mm
- Closure: peel-off self-adhesive strip
- Opening feature: tear-off strip
- Recyclability: 100% recyclable
- Sizes: six available from 170 x 245mm up to 310 x 445mm (opening width x internal height)
- Supplied: sold per pack, sealed in cardboard boxes
Choose the right rigid mailer
This rigid mailer is ideal when flat items need solid-board structure with a short edge opening and self-seal closure.
- Choose this rigid mailer for documents, files, DVDs and books in 400gsm solid board, expanding up to 30mm, that are packed best using a short edge opening.
- Choose cardboard mailing envelopes when you need corrugated board and more depth, adjustable up to 40mm, all sealed with an adhesive strip.
- Choose Do Not Bend envelopes when documents must stay flat and rigid with a pre-printed warning message.
- Choose white cardboard envelopes when you want the same board protection in a white finish.
FAQs
Does this rigid mailer need extra tape?
No. The peel-off self-adhesive strip closes the envelope without additional tape, so packing teams work quickly.
How thick can the contents be?
The height expands up to 30mm, which suits thicker flat items such as books, files and media.
Can the recipient open it without scissors?
Yes. The built-in tear-off strip opens the rigid mailer envelopes cleanly after sealing, without cutting the contents.
Is it recyclable?
Yes. The solid board mailer is 100% recyclable.
How is it supplied?
It is sold in packs, sealed in boxes, with quantity discounts on three or more packs.
Also useful
- Cardboard envelopes for comparing board weights, depths and finishes across the range.
- Labels for clear address and despatch information on the board surface.
- Postal boxes for when bulkier goods still require rigid protection need to match key courier requirements for postage.