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To post a letter or package choose from different size envelopes which are suitable for the contents. Make sure your mailings arrive safely in padded ones that take the brunt of hits and bumps.


Popular standard sizes include A4, A5, C4, C5, and DL envelopes measuring 11x22 cm. For ease of use, choose packing with windows as a time-saving feature when sending bulk mailings. Instead of white, buy coloured and pearlescent mailers for personal and business use.

  • 50 x C5/A5 PLAIN WHITE SELF SEAL ENVELOPES 90gsm SS

    50 x C5/A5 PLAIN WHITE SELF SEAL ENVELOPES 90gsm SS

    £2.42
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    Free P&P
    • 153 watching
    • |
    • 2777 sold
    Here we have for sale 50 C5 Plain White Envelopes. Excellent for letters etc. Fast Free Delivery By Royal Mail!
  • 50 x C5/A5 PLAIN WHITE SELF SEAL ENVELOPES 90gsm SS

    50 x C5/A5 PLAIN WHITE SELF SEAL ENVELOPES 90gsm SS

    £2.55
    Buy it now
    Free P&P
    • 134 watching
    • |
    • 4046 sold
    YOU ARE PURCHASING 50 x SIZE C5 / A5 WHITE PLAIN ENVELOPES - SIZE OF ENVELOPES ARE 229x162mm, 90gsm STRONG - HIGH QUALITY ENVELOPES, AS PICTURED. Strength/Quality 90gsm - Strong,Good Quality.
  • 100 x C5/A5 PLAIN WHITE SELF SEAL ENVELOPES 90gsm SS - KW1791

    100 x C5/A5 PLAIN WHITE SELF SEAL ENVELOPES 90gsm SS - KW1791

    £3.99
    Buy it now
    Free P&P
    • 16 watching
    • |
    • 113 sold
    C5 Non-Window White Envelope. 229 x 162mm. These items must be returned to us carriage paid in the original packing and in a saleable condition WITHIN 7 DAYS of receipt. P P or carriage on exchange/re...
  • 25 x C5 A5 BOARD BACK BACKED ENVELOPES 229x162mm PIP

    25 x C5 A5 BOARD BACK BACKED ENVELOPES 229x162mm PIP

    £4.50
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    Free P&P
    • 61 watching
    • |
    • 450 sold
    These board back envelopes are ideal for sending documents in the post or via courier, and ensure they do not get creased/bent in transit. Items placed inside the envelopes are not visible through the...
  • 100 x A5 Plain Document Enclosed Wallets Envelopes C5

    100 x A5 Plain Document Enclosed Wallets Envelopes C5

    £3.99
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    Free P&P
    • 117 watching
    • |
    • 3363 sold
    Product Type: Size A5 Plain Document Enclosed Wallets Envelopes. Description: A5 Plain document enclosed wallets. Size 225x165mm. Used for affixing documents to packages parcels, or for putting courie...

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