What are the minimum dimensions of a mail piece categorized as a letter?

Prepare for the USPS Postal Support Employee Test. Use flashcards and multiple-choice questions with hints and explanations. Get ready to succeed!

The classification of a mail piece as a letter is determined by specific dimensional requirements set by the USPS. For a piece to be categorized as a letter, it must have minimum dimensions of 3 1/2 inches in height, 5 inches in length, and a thickness of 0.007 inches. This ensures that the mail piece can be efficiently processed through the postal system while being able to fit within the necessary mechanical handling equipment used by the USPS.

The option selected accurately reflects these minimum requirements. While other dimensions may appear close, such as those in the first, third, and fourth choices, they do not meet all the criteria set forth for a letter. For instance, the dimensions in these options either fall below the required height or length, or they do not adhere to the specified thickness. Therefore, the selected choice aligns perfectly with the official Postal Service guidelines for letters, making it the correct answer.

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