Custom Printed C5 Envelopes UK: Branded A5 & Folded A4 Mailers
Reduce postal mailing expenditure with custom printed C5 envelopes (162 ×. 229 mm). Tailored to house flat A5 brochures or single-fold A4 letters under Royal Mail Standard Letter rates. Explore our complete custom printed envelopes collection, featuring wallet and pocket flaps, address windows, Peel &. Seal strips, and free UK delivery.
Executive Summary: Custom Printed C5 Envelopes at Printways UK
Custom printed C5 envelopes measure 162 × 229 mm, purposefully designed to hold an unfolded A5 card/booklet or a standard A4 sheet folded cleanly in half. Sized to leverage Royal Mail's Standard Letter tariff (under 5mm thickness and 100g weight), switching from flat C4 mailings to folded C5 dispatches reduces postal handout costs by up to 50%. Printways supplies trade-quality C5 envelope printing across 100gsm bright white wove, 120gsm prestige bond, recycled eco-manila kraft, 135gsm DuoColor, and 360gsm rigid all-board mailers. Choose between wallet (long-edge) or pocket formats, clear address windows, and tamper-evident Peel &. Seal strips with free UK delivery.
Technical Specifications: C5 Printed Envelope Series
Authoritative dimensional tolerances, substrates, closure chemistry, and UK postal tariffs for C5 envelopes.
| Substrate & Format | Metric Dimensions | Closure Mechanics | Primary Application | Royal Mail PiP Category |
|---|---|---|---|---|
| 100gsm High-White Bond | 162 × 229 mm | Self-Seal / Peel & Seal | A5 letters, invoices, general correspondence | Standard Letter (<5mm / 100g) |
| 120gsm Prestige Smooth Bond | 162 × 229 mm | Peel & Seal (24+ mo shelf life) | Executive mailings, client proposals, luxury mail | Standard Letter (<5mm / 100g) |
| Recycled Manila Kraft | 162 × 229 mm | Self-Seal / Peel & Seal | Utility billing, logistics notes, internal archives | Standard Letter (<5mm / 100g) |
| 135gsm DuoColor / Coloured | 162 × 229 mm | Peel & Seal | Direct mail campaigns, invitations, retail offers | Standard Letter (<5mm / 100g) |
| 360gsm Rigid All-Board | 162 × 229 mm | Peel & Seal + Tear Strip | Photos, certificates, flat non-bend items | Standard Letter / Large Letter |
Product Overview: Optimized A5 Mailers & Postal Cost Reduction
When sending multi-page direct mail campaigns, corporate brochures, stitched catalogues, or formal office business mail, selecting custom printed C5 envelopes (162 × 229 mm) offers the ideal balance between visual presentation and postal cost optimization. A standard C5 envelope holds an A5 sheet flat (148 ×. 210 mm) or a standard A4 sheet folded neatly in half.
At Printways, our printed C5 envelopes UK line is built to maximize marketing impact while controlling postage tariffs. Under Royal Mail’s Pricing in Proportion (PiP) structure, Royal Mail PiP C5 printed envelopes qualify for the Standard Letter rate—provided the finished mailer stays under 5mm in thickness and 100g in total gross weight. Compared to sending unfolded A4 documents in larger C4 envelopes (which trigger Large Letter rates), switching to folded C5 mailings can save businesses up to 50% in postal expenditure across large marketing volumes.
Whether you require budget-friendly C5 envelope printing for everyday utility invoicing or high-impact branded C5 envelopes printed in full colour for direct-mail campaigns, Printways delivers high-speed trade custom print with transparent pricing and free UK mainland delivery.
Key Features & Stock Options
1. Paper Substrates & Materials
- C5 100gsm White Printed Envelopes: made from bright-white uncoated bond paper featuring an opaque blue cross-hatch internal security tint to guarantee document confidentiality.
- 120gsm Prestige Smooth Bond: A luxury paper stock providing a smooth, heavyweight feel for corporate stationery, executive letters, and high-end promo mailings.
- C5 Manila Printed Envelopes: Produced from recycled unbleached kraft paper. It gives sustainable, tear-resistant performance for invoices, delivery notes, and administrative filings.
- 135gsm DuoColor Solid-Dyed Stock: Premium dyed papers featuring vibrant contrast linings, perfect for luxury retail and high-response promo mailers.
- 360gsm Rigid All-Board C5 Mailers: Constructed from heavy-duty white-lined grey board. It gives zero-bend protection for flat photographs, certificates, and delicate items.
2. Flap Architecture & Layout Configurations
- C5 Wallet Envelope Printing: Features a horizontal flap along the longer 229mm top edge. Wallet envelopes are the industry standard for fast manual enclosure of corporate letters, greeting cards, and flyers.
- Printed C5 Pocket Envelopes: Opens along the shorter 162mm edge. It gives increased side-seam strength for heavy multi-page documents and catalogues.
- Machine-Inserter Gummed Flaps: Formulated with water-activated adhesive, designed made for mechanical inserters (such as Pitney Bowes, Quadient, or Neopost presses) to prevent feeding jams.
3. Window & Non-Window Configurations
- C5 Window Printed Envelopes: Features a clear film aperture (39 ×. 93 mm or 45 ×. 90 mm) positioned on the bottom-left or bottom-right. This lets reader addresses printed on internal enclosures to show through.
- C5 Non-Window Printed Envelopes: Offers an uninterrupted solid paper face across the entire front surface, ideal for displaying large logos, custom artwork, return address blocks, and Postage Paid Impressions (PPI).
4. Sealing Mechanics & Shelf Life
- C5 Peel and Seal Envelope Printing: Built with a protective release paper strip covering hot-melt adhesive, offering an extended shelf life of 24+ months and a tamper-evident seal.
- C5 Self-Seal Printed Envelopes: Features pressure-sensitive latex adhesive on opposing flaps for immediate, tool-free closure.
Direct Mail & Marketing Capabilities for UK Brands
C5 envelopes serve as a primary marketing vehicle across the United Kingdom. Printways provides specialized trade press setups to help direct mail agencies and corporate brands maximize reader open rates.
Custom C5 Brochure Envelopes
Purpose-built to carry multi-page sales brochures, product catalogs, and corporate presentation decks without tearing or creasing seams.
C5 Booklet Mailer Printing
Optimized for thick, saddle-stitched or perfect-bound A5 booklets. This ensures smooth manual or automated insertion and reliable seam adhesion.
Logo Printed C5 Envelopes
Elevates brand identification instantly in the postbox by placing crisp vector logos and corporate branding on the front face or reverse flap.
Full Colour C5 Envelopes
Printed in high-definition 4-colour CMYK to capture immediate reader attention, support promo branding, and drive response conversions.
Variable Data Printing (VDP) UK
Print customer addresses, custom messaging, unique QR codes, and mailing barcodes directly onto your envelopes during the press run.
Trade Litho & Bulk Procurement
Scalable making options for print resellers, marketing agencies, and corporate buyers requiring volumes from 250 up to 100,000+ units.
┌─────────────────────────────────────────────────────────────┐ │ PRINTWAYS C5 ARTWORK TEMPLATE │ │ │ │ ┌─────────────────────────────────────────────────────┐ │ │ │ ← 3mm Safe Zone (Keep text & logos inside) │ │ │ │ │ │ │ │ [ BRAND LOGO ] [ PPI / STAMP ] │ │ │ │ │ │ │ │ ┌───────────────────────────┐ │ │ │ │ │ OPTIONAL WINDOW APERTURE │ │ │ │ │ │ 39 x 93mm or 45 x 90mm │ │ │ │ │ └───────────────────────────┘ │ │ │ │ │ │ │ │ [ RETURN ADDRESS ] │ │ │ └─────────────────────────────────────────────────────┘ │ │ ← 5mm Gripper Margin along outer edges (No heavy ink) │ └─────────────────────────────────────────────────────────────┘
Simple 4-Step Trade Ordering Process
Order custom printed C5 envelopes online in minutes with free pre-press verification.
Configure Specs
Choose quantity, paper stock, sealing type, window placement, and print ink options.
Upload Artwork
Attach your print-ready PDF artwork file, or request professional design assistance.
Approve Digital Proof
Our pre-press specialists inspect your file for resolution, safe zones, and gripper margins.
Fast UK Delivery
Your order goes straight to press and is dispatched via tracked courier with free UK mainland delivery.
Explore All Custom Printed Envelope Variants
Compare UK postal formats, substrates, window layouts, and closure mechanics across our trade envelope catalogue.
Custom Printed C5 Envelopes: Product FAQs
Key answers regarding C5 envelope dimensions, postage cost calculations, and artwork needs.
What size document fits inside a C5 envelope?
How do C5 envelopes help save on UK postage costs?
What is the difference between Peel &. Seal and Self-Seal closures?
Can you print customer addresses directly on C5 envelopes?
What is the maximum ink coverage for standard custom print?
Upgrade Your Business Mailings Today
Order trade-quality printed C5 envelopes directly from Printways. Configure your specifications online or contact our commercial print team for custom trade quotes.
Request Custom Quote
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Our Promise to You
Premium Quality
We use state-of-the-art printing tech and premium paper stocks to ensure every product meets the highest standards of quality.
Fast UK Delivery
With fast turnaround times and reliable UK-wide delivery, you can count on us to get your prints to you when you need them.
Expert Support
Our team of print experts is here to help you every step of the way, from choosing the right product to checking your artwork.
Complete Guide to Custom Printing
Ordering custom printed materials has never been easier. Whether you are a small business looking for fresh marketing print, or a large enterprise needing bulk commercial print runs, our online calculator ensures you get instant, transparent pricing. We pride ourselves on offering a wide variety of paper stocks, weights, and luxury finishes to make your project stand out from the competition.
How to Prepare Your Artwork
To ensure the highest quality print, please supply your artwork in PDF format. We recommend saving your files with the 'High Quality Print' preset. Here are a few essential tips for the perfect print:
- Bleed Area: Please include a minimum of 3mm bleed on all edges of your design. This ensures no white borders are left when we trim your product to the final size.
- Safe Zone: Keep all important text, contact details, and logos at least 3mm away from the trim edge.
- Resolution: All images and graphics should be supplied at 300dpi (dots per inch) for crisp, clear, and professional results.
- Colour Mode: Convert all RGB and spot colours to CMYK format before exporting your file to avoid unexpected colour shifts.
Understanding Paper Stocks & Finishes
Choosing the right paper stock can dramatically change the feel of your product. Here is a quick guide to our most popular options:
- Silk / Uncoated: A natural, non-reflective finish that is highly readable and easy to write on. Perfect for letterheads, forms, and elegant brochures.
- Gloss: A shiny coating that makes colours pop and images look incredibly vibrant. Ideal for flyers, posters, and photograph-heavy designs.
- Matt Lamination: A smooth, sleek finish that dulls reflections and adds a premium, tactile feel to business cards and luxury presentation folders.
- Spot UV & Foil: For maximum visual impact, add a glossy raised layer or metallic foil to specific parts of your design to draw the eye instantly.
Fast Delivery & Turnaround Times
We understand that business deadlines are critical. Our standard production times are clearly listed in the calculator options. Once printed, orders are carefully packed and dispatched via trusted overnight couriers to ensure they reach you safely and securely across the UK. You will receive a tracking link via email the moment your order leaves our production facility. It gives you complete peace of mind.