Safely send confidential documents
Self seal manilla envelopes send confidential business documents, invoices and statements in light brown manilla paper that minimises print show-through. Manilla is naturally stronger than standard paper, so the envelopes resist tearing and hold up in damp conditions. Self-seal flaps close each one without moistening or tape. The range covers C4 for unfolded A4, C5 manilla self seal envelopes for A5 or A4 folded once, and DL for A4 folded in three, in 80 to 90gsm paper. Most formats are windowless for privacy; the DL reference 1A98 has a 39 x 93mm window. All are made from 100% recycled paper with a minimum 90% post-consumer waste.
Sold in packs of 250, 500 or 1000, priced per pack.
Where do self seal manilla envelopes work best?
Self seal manilla envelopes suit post rooms, offices and despatch desks sending paper documents regularly that need quick, secure closure.
- Confidential business documents such as contracts, HR records and statements, where manilla paper reduces print show-through.
- Daily invoice and letter runs, where self-seal flaps speed up packing with no moistening or separate adhesive.
- A4, A5 and folded A4 mail, where C4, C5 and DL formats match the envelope to the document.
- Stocked mailrooms and stationery cupboards, where packs of 250, 500 or 1000 keep replenishment simple.
Not for
- Bulky catalogues or thick document bundles. Choose manilla gusset envelopes for extra depth.
- Fragile or impact-sensitive items. Use a padded envelope for contents that need cushioning.
- Mailings that must show the address in every format. Most sizes are windowless, with only the DL 1A98 including a 39 x 93mm window.
Specifications
- Colour: brown
- Material: manilla paper
- Paper weight: 80 to 90gsm
- Sizes: 220 x 110mm (DL), 162 x 229mm (C5), 229 x 324mm (C4) (opening width x internal height)
- C4: holds unfolded A4
- C5: holds A5, or A4 folded once
- DL: holds A4 folded into three
- Opening: DL flap on the long edge; C4 and C5 flap on the short edge
- Window: windowless, except DL reference 1A98 with a 39 x 93mm window
- Closure: self-seal flaps
- Recycled content: 100% recycled paper, minimum 90% post-consumer waste
- Pack sizes: 250, 500 or 1000 envelopes
Choose the right envelope
Self seal manilla envelopes sit in the business envelope range, chosen for flat paper documents that need quick, secure closure in a manilla finish.
- Choose self seal manilla envelopes for flat A4, A5 or folded A4 documents, invoices and statements, closed without water or tape.
- Choose white self seal envelopes when you want a white finish for outbound letters and correspondence.
- Choose business envelopes when you want white envelopes with a peel and seal strip rather than a self-seal flap.
FAQs
Are these envelopes suitable for confidential documents?
Yes. The brown manilla paper reduces print show-through, which suits statements, HR documents and other confidential business post.
Do all sizes have a window?
No. Most formats are windowless for privacy. Only the DL reference 1A98 has a window, measuring 39 x 93mm.
What is the difference between C4, C5 and DL?
C4 holds unfolded A4. C5 manilla self seal envelopes hold A5, or A4 folded once. DL holds A4 folded into three, like a traditional letter.
Which size suits a folded letter?
C5 manilla envelopes suit A5 or A4 folded once; DL suits A4 folded into three.
How many envelopes are in a pack?
Packs contain 250, 500 or 1000 envelopes depending on the format, and arrive boxed.
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