What is the smallest size you can mail?

Mail Dimensions and the Smallest Mailable Size

When sending mail, adhering to the established size requirements is essential to ensure efficient delivery. The United States Postal Service (USPS) has specific regulations regarding the dimensions of mailpieces, imposing limits to ensure proper sorting, handling, and postage accuracy.

General Mail Dimensions

For rectangular items, the USPS sets the following minimum and maximum dimensions:

• Thickness: Less than 0.25 inches
• Length: 3.5 inches
• Height: 5 inches
• Width: 0.007 inches
• Length plus girth (twice the height plus twice the width): 10 inches

Exceptions for Keys and IDs

To facilitate the mailing of small items like keys and identification cards, the USPS makes an exception to the minimum thickness requirement. These items can be less than 0.25 inches thick as long as they are enclosed in an envelope that meets the minimum length, height, and width specifications.

Importance of Adhering to Mail Dimensions

Complying with these size limitations is crucial for several reasons:

• Proper Sorting: Mailpieces adhere to specific sorting machines, and non-compliant sizes can cause jams or delays in processing.
• Efficient Delivery: Adhering to size specifications ensures that mail can be seamlessly delivered to mailboxes and receivers.
• Postage Accuracy: The postage required for a mailpiece is determined by its weight and dimensions. Deviating from the established sizes can result in incorrect postage charges.

Alternatives for Small Items

If an item’s size falls below the minimum requirements, there are alternative mailing options available:

• Use a Stamped Envelope: Small, lightweight items can be placed in a stamped envelope and mailed at the standard letter rate.
• Request a Special Permit: The USPS offers a special permit for mailing items outside of the standard size and weight limitations. However, this process requires approval and may involve additional costs.

By understanding the mail dimension regulations and utilizing appropriate mailing methods for small items, you can ensure that your mail reaches its destination efficiently and without any complications.