Folding Inserting Machine Envelopes
Folding Inserting Machine Envelopes
(Enter qty - price will auto update)
£20.34 inc. VAT each
Product Information
Product Information
Our folding & inserting machine envelopes are built for smooth, high-volume mailing where consistency matters. Made from 90gsm high-opacity white paper with a dependable gummed seal, they’re ideal for use in mailing departments, offices, and anyone running a folding/inserting machine.
These envelopes are engineered to reduce stoppages and keep your production line moving, while still working perfectly for manual packing when needed. Choose from DL+ or C5+ sizes, with windowed, non-windowed, and high-window options to match your printing and document layouts.
Key Benefits
- Optimised for folding/inserting machines: consistent feeding and fewer jams
- Classic gummed seal: strong secure closure for everyday business post
- High opacity paper: protects confidential contents
- Multiple window options: standard window, high window, or plain
- PEFC accredited: responsibly sourced and recyclable
Size Guide – Folding & Inserting Machine Envelopes
- DL+ windowed: 114x235mm – 90gsm – Window size: 35x90mm – Window position: 19mm from left, 18mm from bottom
- DL+ non-windowed: 114x235mm – 90gsm
- C5+ windowed: 162x235mm – 90gsm – Window size: 45x90mm – Window position: 20mm from left, 60mm from bottom
- C5+ non-windowed: 162x235mm – 90gsm
- C5+ high-windowed: 162x235mm – 90gsm – Window size: 45x90mm – Window position: 20mm from left, 72mm from bottom
Product Details
- Seal type: Gummed
- Colour: White outer & white inner
- Paper weight: 90gsm
- Seam: Outside seam
- Envelope sizes: DL+ and C5+
- Window types: Windowed, high-windowed, or non-windowed
- Eco certification: PEFC accredited materials
- For size guidance only this would replace the Pitney Bowes codes: PBENV15, PBENV16, PBENV8, PBENV5, PBENV2
Please note: on windowed envelopes there may be a 2mm tolerance in window position from the left-hand side.
Please note: 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
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Frequently Asked Questions
What sizes are available?
These machine envelopes come in two sizes - DL+ at 114mm x 235mm and C5+ at 162mm x 235mm - with box quantities of 250 or 500 depending on size.
What's the difference between the window options?
You can choose non-windowed, windowed or high-windowed. On the C5+ windowed style the window is 45x90mm positioned 20mm from the left and 60mm from the bottom, while the high-windowed version uses the same window size positioned 72mm from the bottom instead.
Are these envelopes suitable for a folding and inserting machine?
Yes - they're specifically engineered for smooth, consistent feeding through folding/inserting machines to reduce jams and stoppages, while working equally well for manual packing.
What paper weight and seal type do they use?
Each envelope is made from 90gsm high-opacity white paper with a traditional gummed seal for a strong, secure closure once moistened.
Are these envelopes eco-friendly?
Yes - they're made using PEFC accredited materials, meaning the paper is responsibly sourced and recyclable.
How quickly will my order be despatched?
Orders placed before our daily cut-off are despatched the same working day, with trade pricing that falls as you buy more and free UK delivery on orders over 100 pounds (prices shown are VAT-exclusive).
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.

