Track Your First Class Mailings & Save Big! Free Trial!


Track Your First Class Mail for Just 18¢ Per Envelope – No Special Equipment Needed!

Want to know exactly when your letter or flat mail reaches its destination? With LetterTrack, you can add real-time USPS tracking to any First Class envelope for just $.18 per piece.

Whether you're sending invoices, promotional mailers, or important documents – LetterTrack gives you total visibility.

Here's how it works:

✅ Print your own envelopes or address labels
✅ Add USPS-compliant Intelligent Mail Barcodes (powered by Informed Visibility®)
✅ Get real-time email updates when mail is Out for Delivery and even when it's Delivered to Mailbox

Yes, USPS now geo-tracks its deliveries! That means you’ll know the exact time and date when your mail truck reaches the recipient’s mailbox — just like package tracking, but for envelopes.

Simple Setup:

  1. Enter or import addresses (from your PC, Amazon, Etsy, eBay, Shopify, etc.)

  2. Print directly to envelopes (sizes #10, A6, A7, A9) or labels

  3. Apply regular postage (USPS stamps, stamps.com, or postage meter)

  4. Drop it off anywhere USPS picks up mail

Your mail arrives in 3–5 business days, and you stay in full control with a searchable dashboard and automated email notifications for both sender and recipient.

Stop guessing. Start tracking.
Try LetterTrack today – reliable tracking for just 18¢ per envelope.

Your First 5 Letter Tracks, are FREE, Claim This Special Offer Today!

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First-Class Mail has specific size and weight limits for postcards, letters, and large envelopes (flats).
  • Postcards must be between 3.5 x 5 inches and 4.25 x 6 inches, and no more than 0.016 inches thick. 
  • Letters have a maximum weight of 3.5 ounces, with dimensions of 6⅛ x 11½ inches and a thickness of 0.009 to ¼ inch.  
  • Large envelopes (flats) can weigh up to 13 ounces and have maximum dimensions of 12 x 15 inches and a thickness of ¼ to ¾ inch.
First-Class Mail Size Restrictions: 
  • Postcards:
    • Minimum: 3.5 x 5 inches
    • Maximum: 4.25 x 6 inches 
    • Thickness: 0.007 to 0.016 inches  
  • Letters:
    • Maximum Weight: 3.5 ounces
    • Minimum: 3.5 x 5 inches
    • Maximum: 6⅛ x 11½ inches
    • Thickness: 0.009 to ¼ inch
  • Large Envelopes (Flats):
    • Maximum Weight: 13 ounces 
    • Minimum: 6⅛ x 11½ inches
    • Maximum: 12 x 15 inches
    • Thickness: ¼ to ¾ inch
     

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The link on this page is an affiliate links. This means that if you click on the link and make a purchase, we may earn a small commission at no extra cost to you. We only recommend products or services that we believe provide value to our visitors.

Your support helps us continue to provide helpful content. Thank you

  
The Letter Track name, logo and image are trademarks of Letter Track.

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