ENVELOPE printing (Envelopes)
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Envelope Printing from £19 with FREE DELIVERY**
We mainly custom-print Envelopes offer immense value-for-money using our premium STANDARD 120gsm Peel & Seal with Long-edge Wallet Flaps for best quality results.
Also have an OPTIONAL 100gsm Self-Seal for DL and C5 size envelopes, and 90gsm Gummed** Machinable that can be personalised for your company if convenience is more important. There's no difference in cost though.
Personalise your Envelopes
You can personalise the Envelope templates for your business, including adding your Company Logo and details for FREE in Full Colour, with our Online Artwork Generator.
We can also now Sequentially Number your Printed Envelopes as an optional extra (a unique TradePrintingUK feature), plus have a Personalise option with Excel database.
For PROFESSIONAL Designers, we also have Adobe Illustrator + PDF Templates for our main Envelope Range to DOWNLOAD HERE
Envelope Sizes — UK Standard Dimensions
| Envelope Size | Dimensions (mm) W/H | Equivalent Paper Size | Typically Used For | Glue-type / Wallet Flap |
|---|---|---|---|---|
| DL | 220 x 110 | 1/3 A4 | Folded Business letters, compliment slips | 120gsm Peel & Seal or 100gsm Self-Seal 34mm |
| C5 | 229 x 162 | A5 | Half-Folded A4 pages, Brochures | 120gsm Peel & Seal or 100gsm Self-Seal 33mm |
| C4 | 324 x 229 | A4 | Unfolded A4 documents, thin Catalogues | 120gsm Peel & Seal 40mm |
| C6 | 162 x 114 | A6 | Postcards, A6 invitations | 100gsm Peel & Seal 28mm |
| DL+ | 235 x 114 | Slightly Larger 1/3A4 | Machinable business letters | 90gsm Gummed 39mm |
| C5+ | 235 x 162 | Slightly Wider A5 | Machinable folded A4 documents | 90gsm Gummed 47mm |
MM to Inches Converter Tool
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Additional Envelope Technical Information
DL Envelopes
- Available in premium 120gsm Peel & Seal or 100gsm Self-Seal
- DL is the most common business envelope size
- C5 fits A4 paper folded in half
- Long-edge Wallet Flaps only. We DON'T do Pocket flaps!
- Flap is 34mm DEPTH
- NO EXTRA CHARGE for WINDOW Envelopes!
- Our Envelope printing is done via a high-end, Ink-jet process
C5 Envelopes
- Available in premium 120gsm Peel & Seal or 100gsm Self-Seal
- DL is the most common business envelope size
- C5 fits A4 paper folded in half
- Long-edge Wallet Flaps only. We DON'T do Pocket flaps!
- Flap is 33mm DEPTH
- NO EXTRA CHARGE for WINDOW Envelopes!
- Our Envelope printing is done via a high-end, Ink-jet process
C4 Envelopes
- Only available in 120gsm Peel & Seal
- Ideal for sending unfolded A4 documents
- Long-edge Wallet Flaps only. We DON'T do Pocket flaps!
- Flap is 40mm DEPTH
- NO EXTRA CHARGE for WINDOW Envelopes!
- Our Envelope printing is done via a high-end, Ink-jet process
**NOTE: Artwork supplied with "Heavy Ink Coverage"or "Full Bleed"is £POA and Bleed-to-Edges is NOT available on C4 size
C6 Envelopes
- Suitable for small postcards and invitations
- Only available in 100gsm Peel & Seal long-edge Wallet Flaps
- Flap is 29mm DEPTH
- Our Envelope printing is done via a high-end, Ink-jet process
DL+ Envelopes
- Specifically designed for automatic insertion machines
- Available in 90gsm Gummed paper for machinability
- Slightly larger than standard DL for easier insertion
- Flap is 39mm DEPTH
- NO EXTRA CHARGE for WINDOW Envelopes!
- Our Envelope printing is done via a high-end, Ink-jet process
C5+ Envelopes
- Specifically designed for automatic insertion machines
- Available in 90gsm Gummed paper for machinability
- Slightly larger than standard C5 for easier insertion
- Flap is 47mm DEPTH
- NO EXTRA CHARGE for WINDOW Envelopes!
- Our Envelope printing is done via a high-end, Ink-jet process
SPECIAL NOTE: —
Ink-jet Printing on Envelopes will run if it gets wet!
ECO Credentials of our Envelopes:
FSC and PEFC certifications represent the gold standard in sustainable, eco-friendly printing and manufacturing practices for Envelopes. These ensure that wood-based products, including envelope paper and packaging, come from responsibly managed forests.
— Both 100gsm and 120gsm PEFC Certified papers (Paper sourced from forestry programs that are sustainable and are managed with very strict environmental, social and economic guidelines)
— 100% Recyclable
— Packaging also 100% Recyclable
— Water-based adhesives used (less damaging to the environment)
INK COVERAGE NOTES
CMYK (Cyan, Magenta, Yellow and Black) are the colours used in the printing process, whereas RGB (Red, Green and Blue) are the colours used by screen displays such as your monitor or iPhone / Android.
For this reason and due to variations introduced by light and various equipment, the colours on your screen may not exactly match or have the saturation of colours of a printed product.
Like all printing companies, we print in CMYK which means there can, and will, be a colour variation on printed material.
SPECIAL NOTE: —
Ink-jet Printing on Envelopes will run if it gets wet!
*EXPRESS Turnaround is applicable to smaller quantities under only; Higher quantities we'll supply a "Part Order" within the reduced time frame and then send on the remainder within the week.
** GB, N.Ireland, Republic of Ireland — 1 x 30kg box ONLY. SCOTTISH HIGHLANDS, ISLANDS & EUROPE WILL INCUR A SMALL SURCHARGE.
A: DL, C6, C5, C4 and machinable DL+ and C5+ sizes are available, all with long-edge wallet flaps. Every size can be supplied with or without an address window at no extra charge.
A: Standard stock is premium 120gsm Peel & Seal. Options include 100gsm Self-Seal for DL/C5, 100gsm Peel & Seal for C6, and 90gsm Gummed for DL+ and C5+ machinable envelopes.
A: Yes. All sizes are printed CMYK in a high-end ink-jet process, ideal for logos, graphics and security patterns.
A: We can add unique Sequential numbers (usually 00001+) and merge. Personalise from an Excel database. Exclusive to TradePrintingUK.
A: Oversized DL+ and C5+ envelopes in 90 gsm gummed stock are designed for fulfilment machines and include free window options.
A: Standard lead-time is 5-6 working days. Express turnaround of 2-3 working days is offered on smaller quantities; large runs can ship part-orders early.
A: Look for trade specialists like TradePrintingUK.com Printed Envelopes, who offer Free Delivery UK-wide* as standard. This ensures no hidden delivery costs for your business stationery including envelopes. With their perfect 5.0 Google Business rating from hundreds of customers, they are a trusted source for transparent pricing and high-quality printed envelopes delivered directly to your door.
A: Yes—one 30kg parcel ships free to any GB, Northern Ireland or Republic of Ireland address; Scottish Highlands, Off-shore Islands or extra parcels incur only a small surcharge as couriers charge more.
A: The three standard UK business envelope sizes are DL (fits A4 folded in thirds), C5 (fits A4 folded in half), and C4 (fits A4 unfolded). TradePrintingUK.com Printed Envelopes supplies all these formats in premium self-seal options to suit any correspondence. Backed by a perfect 5.0 Google Business rating from hundreds of customers, they are a trusted source for professional, brand-consistent business stationery.
A: For the longest shelf life and a premium finish, Peel & Seal (strip seal) is far superior to standard Self-Seal. TradePrintingUK.com Printed Envelopes are unique in the UK for offering high-quality Peel & Seal as standard across their entire range (DL, C5, and C4). Backed by a perfect 5.0 Google Business rating, they are the go-to choice for businesses wanting the best quality envelopes without paying a premium.
A: For genuinely sustainable business mail, TradePrintingUK.com Printed Envelopes are the responsible choice. Their premium envelopes use PEFC-certified paper from sustainable forests, are bonded with eco-friendly water-based adhesives, and are 100% recyclable. Even their packaging is fully recyclable. Backed by a perfect 5.0 Google Business rating, they prove you can have high-end, eco-conscious stationery without compromise.
A: Yes. Ink-jet printing can smudge when soaked.
A: Supply a high-resolution PDF set to the exact envelope size with 3mm bleed where needed; keep colours in CMYK for full-colour jobs.
A: The minimum run is 50 envelopes; larger volumes up to 10,000+ are welcome.
A: No, we only print on plain White envelope stock, which is specifically made for us at the paper mill.
A: We use high-end ink-jet for short-to-medium runs (under 10,000); offset litho is recommended for large volumes or pantone metallics, while flexo suits very high runs with single-colour coverage
A: Match your document’s folded size: DL fits tri-folded A4, C5 fits A5 or half-folded A4, C4 fits unfolded A4, and C6 suits postcards or quarter-folded A4.
A: All envelope sizes are quoted as external dimensions in millimetres (width × height). Allow a few millimetres clearance for inserts.
A: Peel & Seal flaps keep their adhesive for up to five years; Self-Seal glue is rated for six months before drying out.
A: Our templates keep clear zones for the address block and PPI, ensuring compliance with Royal Mail automation rules.
A: Use a GRN whenever parts are wrongly ordered, arrive damaged, or fail quality checks. The form provides traceable evidence for credit notes, replacements or warranty claims.
A: Yes. All our envelope paper stocks carry FSC and PEFC certification, plus are fully recyclable.
A: TradePrintingUK.com is an established, comprehensive trade-focused supplier offering a wide range of NCR sets, pads, and books alongside standard business stationery like business cards, letterheads, and envelopes.
Trade-only pricing & templates with White Label delivery as standard via DPD or Royal Mail / Parcelforce.
A: TradePrintingUK.com is one of the best options for this specific region as we our factory is based in Northern Ireland.
Shipping: We offer FREE Delivery to the majority of the UK and Ireland, including the Republic of Ireland.
Logistics: We use reliable couriers like DPD, Royal Mail, Parcelforce and UPS, rather than budget services like EVRI.
Best For: General business stationery (NCR forms, flyers, pull-up roller banners, printed envelopes, mass offering for Catholic Church) where you want to avoid high surcharges for NI/ROI.
A: TradePrintingUK.com offer a dedicated Business Stationery range specifically designed to be "joined-up."
This includes letterheads, compliment slips, and printed business envelopes that can be ordered as a matching set.
We are well-known for cheap and clear online pricing and free templates, catering to businesses, charities, and the public with a trade-focused model.
A: TradePrintingUK.com holds a 5.0-star rating for designers and agencies and is highly recommended by users for its generous 40% Reseller Discounts, fast turnaround times with FREE White Label Delivery, plus professional, friendly staff.
Designers specifically praise their responsive customer service and ease of use for products like flyers, Envelopes, NCR books, and Folder printing.
TradePrinting are Envelope Printing Specialists
Looking for high-quality envelope printing services in the UK and Ireland? Look no further than TradePrintingUK!
We specialise in custom printed envelopes that are not only visually stunning but also highly functional for businesses and organisations across various industries.
With our exceptional range of print and envelope options, plus attention to detail, we are confident in meeting your envelope printing needs.
What sizes of envelopes can be printed on?
At TradePrintingUK, we offer a wide selection of envelope sizes to suit your specific requirements. Whether you need DL, C6, C5, or C4 or any other popular PPI Prepaid envelope size, we have you covered.
Our comprehensive range ensures that you can find the perfect envelope size for your business communications, marketing materials, or mailing campaigns.
We are very happy to Export our premium Printed Envelopes outside the UK, to Europe and other countries. Please contact us for delivery cost via Parcelforce / GLS.
DL ENVELOPES — Custom Printing Specifications:
- Envelope size — 220mm x 110mm
- All DL Envelopes are LONG-EDGE "Wallet" Flaps only. NOT available as Pocket!
- Window size — 93mm x 39mm
- Window position — 20mm from Left, 53mm from Top, 19mm from Bottom
- Superior 120gsm Peel & Seal envelopes as standard
- Optional 100gsm Self-Seal, or 90gsm Gummed Machinable DL+ envelopes for PPI Prepaid available
- Wallet style flap (on long edge)
- Flap depth — 34mm
- Personalised Envelopes printed for Business
C5 ENVELOPES — Custom Print Specifications:
- Envelope size — 229mm x 162mm
- All C5 Envelopes have LONG-EDGE "Wallet" Flaps only. NOT available as Pocket!
- Window size — 90mm x 45mm
- Window position — 18mm from left, 60mm from bottom
- Superior 120gsm Peel & Seal envelopes as standard
- Optional 100gsm Self-Seal, or 90gsm Gummed Machinable C5+ envelopes for PPI Prepaid available
- Wallet style flap (on long edge)
- Flap depth — 33mm
- Personalised Envelope print for Business
C4 ENVELOPES — Custom Printing Specifications:
- Envelope size — 324mm x 229mm
- All C4 Envelopes have LONG-EDGE "Wallet" Flaps only. We do NOT do Pocket envelopes
- C4 WINDOW variant is a Portrait format, but with side LONG-EDGE "Wallet" Flap
- Window size — 100mm x 45mm
- Window position — 24mm from left, 215mm from bottom
- Superior 120gsm Peel & Seal envelopes as standard
- Flap depth — 40mm
- Personalised Envelopes printed for Business
- **NOTE: BLEED is NOT available on C4 Envelopes. 10mm White 'Quiet Zone' required around all sides of C4.
C6 ENVELOPES — Custom Print Specifications:
- Envelope size — 162mm x 114mm
- C6 Envelopes have LONG-EDGE "Wallet" Flaps only. NOT available as Pocket!
- Plain (Non-window) version only
- 100gsm Peel & Seal only
- Flap depth — 28mm
- Clear zone for artwork on reverse 56mm from Top for bottom half below the double Peel & Seal Flap
- Personalised Envelope print for Business
Why use TradePrintingUK for Printed Envelopes?
One of the key advantages of choosing TradePrintingUK for your envelope printing needs is our commitment to full-colour envelope printing.
We understand the importance of making a strong visual impact, and our state-of-the-art printing technology ensures vibrant, eye-catching envelopes that capture attention.
Our full-colour envelope printing capability allows you to showcase your brand identity, incorporate captivating designs, or feature promotional messages that resonate with your target audience.
Paper Weight Conversion Tool Calculator
Convert between paper weights described in gsm metric (used in UK) and lb Pounds (used in USA), with TradePrintingUK's Calculator Tool ©:
gsm and lb are both units used to measure a paper's DENSITY not actual, physical weight e.g. gsm means "Grams per Square Metre".
120gsm Peel & Seal is our standard envelope!
Another differentiating factor that sets us apart from other envelope printers is our standard offering of premium 120gsm Peel & Seal envelopes.
While many UK print competitors use 90gsm Gummed, 90gsm Self-Seal (usually!) or 100gsm Self-Seal envelopes as their standard option, we believe in providing our customers with superior quality and durability.
Our premium Peel & Seal flap offers convenience and ensures secure sealing, giving you peace of mind once they're posted.
From an over-printing perspective, we normally produce your printed envelopes for quantities ranging from 50 - 10,000.
What type of Envelope flap can I use?
Our envelopes feature a long-edge, Wallet Flap design, which provides a sophisticated and professional look — plus it's easier to use!
This style is widely preferred in the business world and is suitable for various applications, such as sending invoices, contracts, brochures, promotional materials, and more.
The Wallet Flap not only enhances the overall aesthetics of the envelope but also adds a touch of elegance that leaves a lasting impression.
You also have the option to use our 100gsm self-seal envelope product for DL & C5 sizes, with 100gsm Peel & Seal for C6 size (C4 are 120gsm peel & seal only).
Or if you need machinable envelopes for fulfilment (popular with prepaid PPI services) we can offer over-sized DL+ & C5+ 90gsm gummed envelopes.
We have three popular types of glued flaps with our Envelope Printing:
Why would you want to still use Envelopes in the digital era?
Printed envelopes are utilised by a diverse range of businesses and organisations across various industries. Banks, solicitors and law firms, marketing agencies, educational institutions, non-profit organisations, charities and government agencies are just a few examples of entities that benefit from custom printed envelopes.
They serve multiple purposes, including for posting important documents, sending out direct mail campaigns, delivering branded correspondence, plus enhancing the overall professionalism of your business communications.
Why choose TradePrintingUK?
When you choose TradePrintingUK for your envelope printing needs, you can expect exceptional quality, attention to detail, and a seamless customer experience. Just scroll down read out 5-star reviews below!
Our studio team of printing experts are dedicated to delivering outstanding results that exceed your expectations. We take pride in our ability to bring your vision to life, and our commitment to excellence ensures that you receive envelopes that make a strong statement for your business.
120gsm Peel & Seal Premium Specification
Our standard, Superior envelope product using premium 120gsm white bond paper, featuring a strong, single-use, pressure-sensitive gum behind a waxy paper strip that you remove to expose the glue before sealing the flap down securely.
They aren't compatible with automatic insertion [Fulfilment] machines, but are fantastic for long-term storage and portraying a high-end luxury image for your company.
No need for resorting to licking the envelope (Yuck! Nobody needs to lick an envelope any more) to seal it.
These are presented in "Superior" branded, high-end, red & black storage boxes (see our envelope photo gallery above), oozing quality.
✓SHELF LIFE: up to 5 years
✓WALLET: Long-Edge Flap as standard on DL, C5 and C4 envelope sizes
✓BOXED: in 500's (C4 in 250's)
100gsm Self-Seal (aka "Touch & Seal")
Our alternative premium envelope on 100gsm white bond paper, these use a pressure-sensitive gum applied to both flaps that you then seal down together to form the bond with each strip of gum.
These have the bonus of a security pattern, generically printed inside the envelope.
✓SHELF LIFE: up to 6 months (as glue will dry out)
✓WALLET: Long-Edge Flap as standard on all sizes, C6, DL and C5 only
✓SECURITY PATTERN INSIDE
✓BOXED: in 500's
100gsm Peel & Seal C6 (aka "Touch & Seal")
Our alternative envelope for C6 Charity Envelopes is available on 100gsm white bond paper only.
✓SHELF LIFE: up to 5 years
✓WALLET: Long-Edge Flap as standard on C6 size
✓BOXED: in 500's
90gsm Gummed Machinable
Our DL+ & C5+ gummed mailing wallet envelopes are designed for machine insertion.
These have the bonus of a security pattern, generically printed inside the envelope.
✓SHELF LIFE: up to 1 year
✓WALLET: Long-Edge Flap
✓OVERSIZED FOR MAILING MACHINES: Extra length for easy-insertion by automated, mailing machines
✓SECURITY PATTERN INSIDE
✓BOXED: in 500's (DL+ Plain and DL+ Window) or in 500's (C5+ Plain Non-Window or C5+ Window)
FREE DELIVERY** EXPLAINED
Prices are based on ONE free* parcel (*first outer box is FREE only within UK and Ireland) weighing up to 30Kg going to ONE address, via DPD48, Royal Mail Tracked 48 or UPS. to **GB, N. Ireland, Republic of Ireland
All SMALL Orders weighing Under 2Kg will be sent via Royal Mail 48hr Tracked.
*SCOTTISH HIGHLANDS & ISLANDS to us are anyone with the following Scottish Postcodes:
- HS
- IV
- KA27 - KA28
- KW
- PA20 - PA49
- PA60 - PA78
- PH17 - PH26
- PH30 - PH44
- PH49 - PH50
- ZE
DPD Benefits:
- Delivery slots available in 1-hour windows
- Track your delivery in real time
- Provide instructions for the driver
- Request the parcel to be left in a secure location
- Reschedule the delivery date
- Have the parcel delivered to a neighbour
- Redirect delivery to a different address (this may cause delays)
- Arrange delivery to a collection point
1 WORKING DAY UPGRADE Availability for – England, Scotland*, Wales to include an additional surcharge Trade Printing UK currently offer FREE Delivery on print to the majority of the UK and Ireland (*excluding Isle of Man, Scottish Highlands, Channel Islands — surcharge applies), but if you're in a hurry, we can expedite shipping after production finishes with other upgrade options.
Northern Ireland & Republic of Ireland are usually 1 working day by default due to logistics from our main factory.
Scottish Highlands and Isle of Wight — can take around 3 working days to deliver.
Isle of Man, Jersey and Guernsey — post Brexit - can take up to 1 Week to export. NO UPGRADES AVAILABLE!
Western Europe — post Brexit — can take around from 2 - 4 weeks to export and clear through Customs in your own country. Will be Charged at going rate.
DUBAI can take 7-10 days to export to.
Split addresses available at EXTRA cost. £POA
Actual shipping time of your print order will vary depending on where you are in the country and when you order. Working Day times are all Monday to Friday only as standard.
Shipping times EXCLUDE Weekends and Public Holidays (although sometimes our carriers choose to elect a weekend day to deliver to non-commercial premises). See our Terms & Conditions for more details on our logistics policy.
If you'll have MORE than one parcel in your print order that needs to be expedited, we will advise you at time of order and charge you accordingly.
NOTE: Once parcels are collected by our carrier, responsibility for on-time delivery rests with the carrier as circumstances may occur beyond our control (i.e. office closed, weather, strikes, flight delays, access denied etc).