The range of envelopes from Twofold Ltd

We offer bespoke envelopes, and overprinting to personalise your mail and increase your brand awareness and mail open rates. Here you can see the range of envelopes available to order from gummed, peal and seal and self-seal envelopes in a range of sizes, window sizes and positions.

You can make substantial savings with larger orders and FREE storage for up to 12 months and you just schedule delivery of your envelopes through the year. We deliver almost everywhere in the UK and in most cases can deliver next day if ordered before 1.30pm.

For the best envelope prices, storage, and next day delivery, call on

0118 951 9800

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View Popular Envelopes

CheckSecure envelopes – for financial and sensitive documents

Our CheckSecure range is exclusive to Twofold Ltd, with a printed opaque pattern on the inside to prevent the contents from being read, and reducing the risk of fraud.

162 x 235mm env952.503
121 x 235mm env952.405
111 x 235mm env952.401
114 x 235mm env952.114

C – series envelopes

The ‘C series’ is designed to work with standard A4 size paper, either fitting neatly inside, or folded into half or quarters.

SizeWidth x Height (mm)Width x Height (in)
C0917 x 1297 mm36.1 x 51.5 in
C1648 x 917 mm25.5 x 36.1 in
C2458 x 648 mm18.0 x 25.5 in
C3324 x 458 mm12.8 x 18.0 in
C4229 x 324 mm9.0 x 12.8 in
C5162 x 229 mm6.4 x 9.0 in
C6114 x 162 mm4.5 x 6.4 in
C781 x 114 mm3.2 x 4.5 in
C857 x 81 mm2.2 x 3.2 in
C940 x 57 mm1.6 x 2.2 in
C1028 x 40 mm1.1 x 1.6 in
229 x 324mm C4 3709
324 x 229mm C4 13891
324 x 229mm C4 13892
229 x 324mm C4 3710w
162 x 229mm c5 3707
162 x 235mm c5 4408
162 x 235mm c5+ 4407
162 x 238mm c5 + 4708
229 x 162mm c5 13047
162 x 229mm c5 3708
162 x 238mm c5 + 4707
229 x 162mm c5 13893
114 x 162mm C6 2600
114 x 262 C6 3600

DL – Business envelopes

The DL envelope is most commonly used by businesses and differs from the C series in its size. The name DL is often expanded to ‘Dimension Lengthways’. The dimensions of DL are 110 x 220 mm which will hold an A4 sheet of paper folded into 3 equal sections parallel to its shortest sides.

110 x 220mm 2701
114 x 235mm DL 3904
121 x 234mm DL 2114
114 x 229mm DL 3703
114 x 235mm DL 3904
121 x 235mm DL 3114
121 x 235m DL 9114pw
114 x 229mm DL + 15882
110 x 220mm DL 13882
114 x 229mm DL 15882
114 x 229mm DL 15884
155 x 220mm DL + 2800

BRE – Business reply envelope

The BRE is a business reply envelope, this is an envelope that is pre-addressed to the mailer.

102 x 216mm C6 2700

Late meter Posting Envelopes

Late Posting Envelopes for franking mail, enables you to put a small amount of franked mail into a normal Royal Mail pillar box.

Late meter posting envelope

A whole range of envelopes available

If you need pre-paid envelopes, envelope stuffing machine compatible, or just standard envelopes such as C5 or DL, just call to ask about what we can do for you. We also have our special CheckSecure envelopes for sensitive contents, and for late posting, we have our Late Meter envelopes. These manilla, overprinted envelopes allow you to post your urgent mail in your designated Franked post box.These late meter envelopes are not machine compatible and are designed to be hand filled.


If you’re using high volumes of envelopes, you may be interested in our range of mailroom machines, such as Franking Machines and Folder Inserters, which alongside Letter Openers can revolutionise your entire mailroom, speeding up process times and freeing your staff to carry out less mundane duties.

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