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3 Best Mailing Envelopes for Documents (with Sizes & Prices)
Key Takeaways
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The best mailing envelopes for documents, such as Jiffy Airkraft Bubble Envelopes, All Board Double-Sided Envelopes, and Jiffy Green Padded Bags, protect against creasing, moisture, and transit damage.
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Jiffy Airkraft Bubble Envelopes are the only bubble mailers on the market fully laminated throughout, offering full-surface puncture and shock protection.
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All Board Double-Sided Envelopes use a 350gsm double-sided board and are rigid enough to keep even large A4 documents completely flat during delivery.
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Jiffy Green Padded Bags feature a strong 90gsm paper build with no side seams, recycled paper cushioning, and a secure self-adhesive seal for reliable, eco-friendly protection.
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Globe Packaging stocks all three top envelope types with next working day delivery available across mainland UK.
What Are the Best Mailing Envelopes for Documents?
The best mailing envelopes for documents are ones that prevent folding, resist moisture, and survive the physical handling of postal transit. It comes down to what you're sending and how much protection it needs. A certificate heading to a client needs something different from a stack of internal reports.
Three envelope types stand out above the rest for document mailing: Jiffy Airkraft Bubble Envelopes, All Board Double-Sided Envelopes, and Jiffy Green Padded Bags. Each has a specific use case where it genuinely outperforms the others.
Top 3 Mailing Envelopes for Documents
1. Jiffy Airkraft Bubble Envelopes (JL000–JL8)
Jiffy Airkraft Bubble envelopes are fully laminated, making them more resistant and shock-absorbing.
The Jiffy Airkraft is the gold standard in padded mailing envelopes and is the most widely recognised bubble envelope brand on the market. What separates it from cheaper alternatives is its construction. Jiffy Airkraft Bubble Envelopes are manufactured in the UK using 90gsm kraft paper on the outside and nylon-coated Astro Supra bubble wrap on the inside.
The critical difference between Jiffy Airkraft and competing bubble envelopes is that Jiffy is fully laminated throughout the entire envelope. Most alternatives only cover the sides and corners. This full lamination provides superior shock absorption, puncture resistance, and water resistance across the entire surface area of the envelope.
Each envelope includes a self-adhesive peel-and-seal strip, meaning no tape or glue is required to close them securely. They're ideal for sending documents that need a layer of cushioning.
Size
Jiffy Airkraft Bubble Envelopes are available in sizes JL000 through to JL8, covering a wide range from small item mailers right up to large document envelopes. The JL4 and JL1 sizes are the most commonly used for standard A4 and A5 document mailing, respectively.
Price
Pricing varies by size and quantity. At Globe Packaging, Jiffy Airkraft Bubble Envelopes are available at £5.95 for 50 bags (90x145mm). Its largest size, 460x660mm, is available at £44.95 for 50 pieces. Bulk purchasing from Globe Packaging offers the most cost-effective rate, with stock held ready for next working day delivery across mainland UK.
2. All Board (Double-Sided) Envelopes
All board envelopes are extremely sturdy, with 350gsm thickness.
When a document absolutely cannot bend, board-backed envelopes are the professional's choice. These are rigid, flat, and purpose-built for keeping contents completely crease-free from dispatch to delivery.
All Board Envelopes feature double-sided 350gsm board construction, making them significantly more rigid than standard padded mailers. The 350gsm thickness means the envelope itself acts as a firm shell around your document, preventing any flexing during transit. They're available in a clean white finish, which also makes them suitable for professional and presentational use.
Beyond documents, these envelopes are also widely used for mailing photographs, certificates, and delicate items like CDs and DVDs, where surface damage from bending would render the contents useless.
Size
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C5: suits A5 documents or folded A4 sheets
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C4: fits full A4 documents flat, without folding
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12" LP Mailer: designed for vinyl records but works well for large-format documents and artwork
The C4 size is the go-to for most professional document mailing needs, fitting standard A4 pages completely flat. If you're sending legal documents, contracts, or certificates that must arrive unfolded, C4 board-backed envelopes are the correct choice.
Price
All board envelopes are available through Globe Packaging with pricing structured around quantity. C4-sized all-board envelopes start at £16.75 for 50 pieces, while C5-sized ones start at £11.95 for 50 pieces. As with all products in the range, they're held in stock for next working day delivery within mainland UK.
3. Jiffy Green Padded Bags
Jiffy Green Padded Bags are completely biodegradable and recyclable.
For professionals looking to combine strong document protection with an eco-conscious approach, the Jiffy Green Padded Bag delivers on both fronts without compromising on transit durability.
Jiffy Green Padded Bags are constructed with a tough 90gsm paper outer, double-fold corners, and a double-glued bottom flap, with no side seams. That last detail matters more than it sounds. Side seams are typically the weakest point of a padded bag, and removing them dramatically increases burst resistance during rough handling in postal sorting facilities.
The interior cushioning is made from 100% recycled paper fibres, making the entire bag fully recyclable, compostable, and 100% biodegradable. There's no bubble wrap, no plastic laminate. It only consists of heavy-duty paper engineering that genuinely protects documents in transit. The self-adhesive strip seals firmly without needing tape or glue, keeping the sending process quick and clean.
Size
Jiffy Green Padded Bags are available in a range of sizes to accommodate different document formats. If you're mailing a single A5 flyer or a thick-bound report, there's a size in the range that fits without excessive movement inside the bag, which is important because internal shifting during transit is a leading cause of document corner damage.
Price
Globe Packaging offers 50 pieces of Jiffy Green Padded Bags (105x229mm) for £10.39, with bulk orders of 200 costing £33.95. They are also available in other sizes. Bulk orders reduce per-unit cost significantly, making them a practical choice for businesses with regular mailing needs.
Top 3 Mailing Envelopes for Documents: Summary Table
Get Your Mailing Envelopes From Globe Packaging
Globe Packaging makes it straightforward to get the right envelope without the guesswork. As an authorised distributor of the full Jiffy-branded product range, every envelope listed here is held in stock and available for next working day delivery across mainland UK for orders over £50; no waiting, no substitutions.
If you need the rigid protection of board-backed C4 envelopes for legal documents, the full-laminate cushioning of Jiffy Airkraft bubble mailers for fragile contents, or the eco-friendly toughness of Jiffy Green padded bags for sustainable business mailing, Globe Packaging has the complete range ready to go.
Shop for mailing envelopes for documents at Globe Packaging today!
Frequently Asked Questions (FAQs)
What envelope size do I need for A4 documents?
For A4 documents that must arrive completely flat and unfolded, a C4 envelope is the correct choice. It measures 324mm x 229mm, which accommodates a full A4 sheet (297mm x 210mm) with room to spare. For documents that need padding in addition to size, the Jiffy Airkraft JL4 (240mm x 320mm) is the standard bubble mailer equivalent for A4 mailing.
Are bubble envelopes suitable for legal documents?
Yes. Jiffy Airkraft Bubble Envelopes are well-suited for mailing legal documents, particularly multi-page contracts, bound agreements, or thick document packs where some degree of cushioning prevents corner damage. The full-laminate construction provides water resistance as well as shock absorption, which protects against the environmental hazards legal documents face in postal transit.
What does 350gsm mean for board-backed envelopes?
GSM stands for grams per square metre. It’s the standard measurement for paper and board thickness. At 350gsm, the board used in double-sided envelopes is exceptionally rigid compared to standard cardboard, which typically falls in the 200–250gsm range. This means the envelope won't flex, bend, or buckle under normal postal handling pressure.
What's the difference between a padded bag and a board-backed envelope?
Padded bags use a layer of cushioning (either bubble wrap or recycled paper fibres) to absorb impact and protect contents from knocks during transit. Board-backed envelopes use rigid card construction to prevent bending and keep documents completely flat. If your priority is protecting contents from physical impact, a padded bag is the better choice; if the document simply cannot arrive creased or folded, board-backed is the right call.
Which mailing envelopes at Globe Packaging are most eco-friendly?
At Globe Packaging, the Jiffy Green Padded Bag is the most eco-friendly option available. Made entirely from heavy-duty paper with 100% recycled cushioning fibres, it produces no plastic waste and breaks down fully after disposal. It's also manufactured without side seams, reducing material waste in production while simultaneously improving structural integrity.
*Note: Product listings, prices, and delivery times shown are approximate and subject to change. Contact Globe Packaging for the latest information.
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