Sending a large First-Class envelope on the SendPro C Lite, SendPro C, SendPro+, SendPro C Auto

Determine if your mailpiece is a letter or large envelope before selecting a rate
Products affected: SendPro® C Lite, SendPro® C, SendPro®+, SendPro® C Auto  (2H00, 8H00, 9H00)

Before you select a rate for a large envelope, you need to determine whether the mailpiece you are sending is a letter or large envelope according to the USPS.

If your mailpiece weighs more than 3.5 oz, the device automatically sets the class to Large Envelope regardless of the dimensions. If the mailpiece weighs less than 3.5 oz but has the dimensions of a large envelope, you need to manually select Large Envelope when you choose the class.
To determine if your mailpiece meets the criteria for a large envelope, use the Postal Advisor app.

To open the Postal Advisor:

  • Tap SendPro Apps on the Home screen, then tap USPS Postal Advisor.

The Postal Advisor also provides information for various types and classes of mailpieces, including postcards, letters, and parcels.

Weigh the mailpiece and measure the dimensions

  1. Tap Print on Envelopes on the Home screen.
  2. If you have the accounting feature enabled, tap Account and select an account.
  3. Place the mailpiece on the scale. The weight appears. You can also weigh the mailpiece using any other postal scale.
    Weight display on envelope printing screen
  4. Measure and record the dimensions of the mailpiece.
  5. Tap Home to return to the Home screen.
  6. Tap SendPro Apps on the Home screen, then tap USPS Postal Advisor.
  7. Tap Flats.
  8. Tap the Physical Characteristics tab and see if your mailpiece is within the weight and size limits.

If the mailpiece is less than 3.5 oz, but has the dimensions of a large envelope:

  1. Tap Home.
  2. Tap Print on Envelopes.
  3. If you have the accounting feature enabled, tap Account and select an account.
  4. Tap Class.
  5. Tap Start Over to show a list of all the available classes.
  6. Tap First-Class Retail Metered for a First-Class mail envelope.
  7. Tap Large Envelope.
  8. Select any special services required.
  9. Tap Apply.
  10. Place the envelope or envelopes on the feed deck. Depending on the SendPro C model you have, feed the envelopes manually or tap Start to feed the envelopes.
    If the envelope is too thick to go through the feeder, print the postage on a tape and apply the tape to the large envelope or flat.

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UPDATED: January 24, 2022

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