What is the weight limit on first class mail

The weight limit for First Class Mail in the United States is 13 ounces (369 grams). This is the maximum weight for a single piece of mail to be considered First Class Mail.

If a piece of mail weighs more than 13 ounces, it is considered a non-machinable package and must be sent as a Priority Mail or Parcel Select item. Non-machinable packages are subject to higher rates and may require additional handling and processing.

Here are some additional guidelines to keep in mind:

It's worth noting that the USPS has a special rate for packages that weigh between 13 ounces and 1 pound (16 ounces or 453 grams). These packages are considered "Large Envelopes" and are subject to a higher rate than regular First Class Mail.

If you're unsure about the weight limit for your mail, you can consult the USPS website or contact your local post office for more information.