Description
Our large book mailer pack of 25 contains twenty-five 278 x 400mm mailers in 400gsm micro F-flute corrugated board that wraps around the item and adjusts to its depth. Each closes with a peel-and-seal strip and opens with a rip strip.
Same product, other pack sizes: pack of 10, pack of 50. Book mailers are corrugated and wrap to the depth of the item, so they protect corners better than a flat cardboard envelope.

Large book mailer pack of 25: specifications
| Size | 278 x 400mm |
|---|---|
| Fits | Large books, A4 files and folders (not A3: 297 x 420mm) |
| Board | 400gsm corrugated, micro F-flute |
| Closure | Peel-and-seal strip |
| Opening | Rip strip |
| Pack quantity | 25 |
| Royal Mail | Royal Mail Small Parcel (over Large Letter size) |
Good for: Large-format books, annuals, A4 ring binders and art portfolios.
Which book mailer size do I need?
Pick the mailer whose inside space is a little bigger than your book; the corrugated wrap adjusts to the depth. Sizes in stock:
- A4 book mailer: 248 x 345mm flat, 209 x 312 x 40mm inside
- Large book mailer: 278 x 400mm, fits A4 files and large books
See the full range in corrugated book mailers.
Buying for a business, school or production?
We supply publishers, bookshops, schools, universities and online sellers. If you order this regularly, contact us to ask about trade pricing.
Large book mailer pack of 25 FAQs
Will A3 fit?
No. A3 is 297 x 420mm, larger than 278 x 400mm.
Will A4 fit?
Yes, with room for thicker books.
Other pack sizes?
Also in packs of 10 and 50.








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