Upload a New Custom Envelope or Overlay

Getting Started

LetterStream provides several return envelope options, but you can also upload your own custom return envelope or artwork. This guide explains the available customization options and how to add them to your mailing.


In This Article


Where to Upload Custom Return Envelopes

  • Go to the Job Inserts Review page.
  • Click the Add an Envelope button.
  • In the section titled "Upload a New Custom Envelope or Overlay (PDF file only)", select your preferred customization option.

Customization Options

Custom Overlay Printing – #9 Envelope

  • Add a standard #9 return envelope first.
  • Upload overlay artwork to be printed on top of it.
  • Ideal for adding small messages within USPS-compliant areas.

Custom Overlay Printing – #10 Envelope

  • Overlay prints on top of a standard #10 outer envelope.

Custom Overlay Printing – #8 Envelope

  • Similar process, but for #8 return envelopes.

100% Client Provided Artwork – #9 Envelope

  • Upload a PDF sized exactly to a #9 envelope.
  • No need to select a standard return envelope separately.

100% Client Provided Artwork – #8 Envelope

  • Upload a PDF sized to a #8 envelope.
  • A #9 return envelope must be included in the mailing to use this option.

Important Guidelines

  • PDF format only: All custom envelope files must be uploaded as PDFs.
  • USPS Compliance: Ensure your artwork follows USPS guidelines to avoid delivery issues.
  • Proofing: You can review your custom envelope artwork in the job proofs before finalizing your mailing.