Post paperwork securely
White self seal envelopes post invoices, statements, letters and everyday office paperwork in bright white 90 or 100gsm paper. A self-seal strip closes each one with no moisture, so teams process outgoing mail quickly. The range covers DL for folded letters, C5 for larger folded sheets and C4 for unfolded A4, in plain or address-window versions. Window versions let the address on the document show through and save on label costs, while windowless versions keep confidential contents covered. DL envelopes open on the long edge, while C4 and C5 open on the short edge. The paper is sourced from sustainable forests and is fully recyclable.
Sold in boxes of 250, 500 or 1000, priced per pack, and supplied sealed in cardboard boxes.
Where do white self seal envelopes work best?
White self seal envelopes suit offices, accounts teams and mailrooms sending everyday paperwork that needs quick, secure closure and a clean white finish.
- Invoices and statements, where DL or C5 formats take folded paperwork and self-sealing speeds up regular runs.
- Letters and business correspondence, where the bright white finish presents well for customer and internal mail.
- Personalised mailings, where window versions show the address already on the document and cut label use.
- Confidential paperwork, where plain windowless envelopes keep contents covered in the post.
Not for
- Peel-off strip preference. Choose white peel and seal business envelopes if your process uses a peel strip.
- Manilla filing or mailing. Choose self seal manilla envelopes where a brown manilla finish is specified.
- Bulky or rigid items. These are for documents and letters, not thick catalogues, samples or goods that need padding.
Specifications
- Colour: white
- Material: paper, 90 or 100gsm depending on format
- Formats: DL, C5 and C4
- Sizes: DL: 220 x 110mm
- Sizes: C5: 162 x 229mm
- Sizes: C4: 229 x 324mm
- Closure: self-seal strip
- Window: plain or address window versions
- Opening: DL opens on the long edge, C4 and C5 open on the short edge
- Pack sizes: 250, 500 or 1000 envelopes per pack
Choose the right envelope
White self seal business envelopes sit in the business envelope range, chosen for everyday office post in a bright white finish with quick self-seal closure.
- Choose white self seal envelopes for letters, invoices and office paperwork, in plain or window versions across DL, C5 and C4.
- Choose manilla gusset envelopes with a peel and seal closure when contents are bulky, such as catalogues that need extra depth.
- Choose Cardboard Do Not Bend envelopes when extra protection against creasing or bending of office documents or letters is needed.
FAQs
What sizes are available?
DL at 220 x 110mm, C5 at 162 x 229mm and C4 at 229 x 324mm.
What paper weight are they?
90 or 100gsm paper, depending on the format.
Do all versions have a window?
No. The range includes plain and address-window versions, so you can match the envelope to the mailing.
How are they supplied?
In boxes of 250, 500 or 1000, sealed in cardboard boxes, with discounts on five or more packs.
How do the self seal business envelopes close?
Peel the strip and press the flap. The self-seal closure needs no moisture.
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