Collection: Coloured Peel and Seal Envelopes

Coloured peel and seal envelopes combine the visual impact of a coloured envelope with the practical efficiency of a self-adhesive peel & seal closure. Available in a range of colour options across over 30 sizes, they are used for direct mail campaigns, greeting card dispatch, branded business correspondence and occasion mailings where speed and colour are both priorities.

Paper weights run from 90–120gsm. The peel & seal strip is covered by a protective liner — peel, fold and press to seal. No moisture required, making them faster and more consistent than gummed envelopes at volume.

Benefits of Coloured Peel and Seal Envelopes

• a range of colour options — covering Black, Blue, Brown, Cream, Gold, Green and more.
• Peel & seal closure — self-adhesive strip for fast, clean closure at volume — no moisture activation required.
• over 30 sizes — from small C6 and DL through to larger formats.
• Paper weights 90–120gsm — suitable for everyday and premium correspondence.
• Higher open rates — coloured envelopes consistently achieve higher open rates than plain white for direct mail.
• Royal Mail compatible — standard sizes qualify as large letter within weight and thickness limits.

Frequently Asked Questions

Can coloured peel and seal envelopes be printed on?
Many coloured envelopes will accept inkjet and laser address printing, but performance varies by colour depth and finish. Lighter colours (pastels, pale tones) generally print well. Very dark colours (deep black, navy, dark red) may not provide sufficient contrast for printed addresses and may need a white address label instead. For direct mail at volume, test print a small batch before committing to the full run. Pre-printing the address before sealing is recommended over franking through a machine on deep-coloured stock.

Do coloured peel and seal envelopes meet Royal Mail address legibility requirements?
Royal Mail requires that the delivery address is clearly legible against the envelope surface. For darker colours, a white or cream self-adhesive address label ensures legibility and full compliance. Standard lighter-coloured envelopes (cream, ivory, pale tones) typically allow direct printing or handwriting without a label.

What is the best colour for a direct mail campaign?
Research consistently shows coloured envelopes achieve around 20% higher open rates than plain white. The best colour depends on your campaign objective: bold primaries (red, yellow, orange) create urgency and energy; pastels (pale blue, pale pink) feel approachable and personal; navy and dark green read as professional and trustworthy; gold and silver feel premium and celebratory. Match the envelope colour to the emotional tone of the campaign rather than just the brand palette.

What sizes are coloured peel and seal envelopes available in?
Available in over 30 sizes across the range, including standard formats DL (110 x 220mm, fits A4 folded in thirds), C6 (114 x 162mm, fits an A6 card), C5 (162 x 229mm, fits A5 or A4 folded in half) and C4 (229 x 324mm, fits A4 unfolded), plus square formats for invitation and greeting card campaigns.