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Plain Envelopes

Our range of plain envelopes come in convenient multipacks, with a wide variety of colours and closures to choose from. Perfect for mailing documents or letters, our versatile envelopes are ideal for businesses and personal use. Don't forget to explore our address labels for a complete mailing solution. Upgrade your mailing room today with our range of envelopes and mailing bags.

151 products found
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New Guardian Envelope 406x305mm Peel/Seal Manilla (Pack of 125) D23703
New Guardian DL Strong Pocket Envelopes Peel/Seal 130gsm Manilla (Pack of 500) E26503
New Guardian C4 Envelopes Gusset Peel/Seal Manilla (Pack of 25) F27666
New Guardian Armour Envelope 381x279x50mm Manilla (Pack of 100) H28313
Plus Fabric C4 Envelope Pocket Peel and Seal 120gsm White (Pack of 250) K26739
Plus Fabric C4 Envelope Pocket Self Seal 120gsm White (Pack of 250) L26370
Kraft Mailing Bag Gusset 250x360x60mm/90mm Lip (Pack of 50) KMB250
Total 151 products

FAQs:

  • What is a windowless plain envelope? A windowless plain envelope is a standard envelope without a transparent window. It provides a blank surface for addressing and sealing, suitable for mailing documents, letters or other flat items securely without revealing their contents through a window opening.
  • What envelope sizes fit through a letterbox? Standard envelope sizes that fit through letterboxes in Ireland typically include DL (110mm × 220mm) and C5 (162mm × 229mm). These sizes are commonly used for posting letters, invoices and documents and are designed to fit easily through standard letterbox slots.
  • How do you use self-sealed envelopes? To use self-sealed envelopes, simply insert your documents, letters or items into the envelope. Peel off the protective strip covering the adhesive on the flap, then press the flap firmly against the envelope to seal it securely without needing additional moisture or glue.
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