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Since the introduction of Pricing in Proportion (PiP) it may be tempting to fold A4 letters into a C5 envelope, but remember first impressions count! Consider the overall presentation impact of an unfolded letter in a pristine C4 envelope against the potential of a folded letter in a smaller envelope. Choosing Plus Fabric means that presentation is important to your business.

In addition Pricing in Proportion means cost savings on some mailings; it is now cheaper to send bulkier items such as catalogues and brochures which fall within the large letter category.

The Plus Fabric C4 25mm gusset envelope is the perfect product to take advantage of these savings.

With PiP there are now 3 categories of mail – Letter, Large Letter and Packet

  • A Letter is maximum 165x240mm, and up to 5mm thick, weighing no more than 100g.
  • A Large Letter is maximum 250x353mm, and up to 25mm thick, weighing no more than 750g.
  • A Packet is longer than 353mm, wider than 250mm, thicker than 25mm or heavier than 750g.


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Plus Fabric is a registered trademark. © All rights reserved. Bong is registered in England. Registration Number: 03895897.