Capacity Book Mailers - Standard Solid Board - 278mm x 400mm
Capacity Book Mailers - Standard Solid Board - 278mm x 400mm
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£5.15 inc. VAT each
Product Information
Product Information
Our Capacity Book Mailer Wallet Envelopes (278mm x 400mm) are gusseted to offer the flexibility of a small postal box when goods are inserted. Suitable for books, magazines, DVD's CD's, Blu-ray disks, gaming disks, diaries, hard backed books and other similar sized items. Our Solid Board Capacity Book Mailer Wallet Envelopes are rigid to offer protection of goods whilst in transit. Easy peel and 'super' strong adhesive seal for simple and secure closure with a customer friendly ripper strip. Also available for bulk buy should you need larger quantities for e-commerce. Our Book Wrap and Post Mailers are manufactured in brown / manila from a sustainable friendly source and are compatible with Royal Mail's Small Parcel category.
Our standard Solid Board Capacity Book Mailers are manufactured with light to medium duty, 400gsm solid cardboard. They are envelope-shaped and offer perfect protection for a range of different products. Our Standard Solid Board 278x400mm mailers are manufactured from 100% recycled and recyclable cardboard material and ensures high quality protection of your items during transit.
We currently offer two different strengths of cardboard capacity mailers - Standard Solid Board & Premium Corrugated. When goods are inserted and wrapped in our Standard Solid Board 278x400mm mailer, it acts like a Small Postal Box. Click here to view the premium corrugated 278x400mm mailer.
Pricing in Proportion (PiP) sizes
All of our Capacity Book Mailers can be identified using Royal Mail’s Pricing in Proportion index. These Capacity Book Mailers - Standard Solid Board - 278mm x 400mm specifically falls into the 'Small Parcel' category.
Product Features of our Standard Solid Board Capacity Book Mailers - 278mm x 400mm
- Envelope-like mailers manufactured from 100% recycled and recyclable material.
- Closure - All capacity book mailers have a peel and seal strip, for easy and secure closure.
- Strength - Standard solid board with 400gsm solid board. Designed for light to medium duty.
Product Details
- Scored for increased capacity – up to 40mm.
- Colour - Brown / Manila.
- Flat Dimensions (W x L) - 278x400mm / 27.8x40cm.
- Load Dimensions (W x L x H) - 238x360x40mm / 23.8x36x4cm.
- PiP Size When Flat - Small Parcel.
- PiP Size When Expanded - Small Parcel.
- For size guidance only this would replace the Kite Packaging code - CSB238X40X360.
- Parcelsend UK SKU - MCP-CBM-5-PSUK & MCP-CBM-5. Formerly: MCP-BOOK278-SSB-20-PSUK.
Due to manufacturer tolerances, actual item dimensions may vary by 10–20mm. If precise sizing is important for your project, we strongly recommend requesting a sample before placing your order.
Fast UK Delivery
Fast UK Delivery
All of our products are manufactured and dispatched right here in our own UK warehouse, which means we can offer some of the fastest turnaround times in the country. And because everything is produced in the UK (unlike many other providers), you’ll never have to worry about customs delays or surprise charges. Delivery is calculated at checkout based on order value - free over £100, from £6.95 under that or select Next Day delivery upgrade for only £9.95. All orders are shipped flat-packed for maximum efficiency.
Product Reviews
Product Reviews
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Frequently Asked Questions
What are the flat and load dimensions of this mailer?
This mailer measures 278 x 400mm flat, and once loaded it can expand up to a load size of 238 x 360 x 40mm.
What Royal Mail PiP band does it fall into?
It falls into the Small Parcel category both flat and when expanded.
What material is it made from?
It is manufactured from 400gsm solid board, offering light to medium duty protection, and is made from 100% recycled and recyclable cardboard.
How is the mailer sealed and opened?
It has an easy peel and 'super' strong adhesive seal for secure closure, plus a customer-friendly ripper strip for simple opening.
What items is this mailer suitable for?
It's suitable for books, magazines, DVDs, CDs, Blu-ray discs, gaming discs, diaries and other similarly sized items.
What pack sizes are available?
Packs range from 10 up to 2000, with trade pricing that falls the more you buy, and orders are despatched the same working day when placed before our cut-off.
Why Choose Us
Free UK Delivery Available
Choose from a few delivery options including FREE delivery to mainland UK on orders over £100.
Trusted Supplier
Over 20 years’ experience in the postal industry under Mailcoms Ltd.
UK Based
All products are printed and made in the heart of England, keeping our carbon footprint as low as possible.

