Can you mail large envelopes as letters

In the United States, the answer is yes, you can mail large envelopes as letters, but there are some restrictions and considerations to keep in mind.

The United States Postal Service (USPS) defines a letter as a mailpiece that weighs 13 ounces or less and measures 11.5 inches long, 6.125 inches wide, and 0.25 inches thick. If your envelope meets these dimensions and weight requirements, you can mail it as a letter.

However, if your envelope is larger or heavier than these limits, it will be considered a package and will require a package rate. In this case, you'll need to use a package shipping service like Priority Mail or Parcel Post, and you'll need to pay a higher rate based on the package's weight and dimensions.

Here are some additional considerations to keep in mind:

1. Size: If your envelope is larger than the standard letter size, you may need to use a larger envelope or a package shipping service.
2. Weight: If your envelope weighs more than 13 ounces, you'll need to use a package shipping service.
3. Shape: If your envelope is irregularly shaped or has unusual dimensions, you may need to use a package shipping service.
4. Content: If your envelope contains items that are not allowed in letters, such as liquids, gases, or hazardous materials, you'll need to use a package shipping service.

To determine whether your large envelope can be mailed as a letter, you can use the USPS's online shipping calculator or consult with a postal worker at your local post office.