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Question: 1 / 400

What is the minimum size for a letter in the USPS?

4 x 6 inches

2 x 4 inches

3 1/2 x 5 inches

The minimum size for a letter in the USPS is 3 1/2 x 5 inches. This measurement is significant as it aligns with the USPS regulations defining what qualifies as a letter. The dimensions ensure that the mail can be properly processed and sorted through automated systems while maintaining legibility and handling ability.

Choosing dimensions smaller than this minimum, such as 2 x 4 inches, would hinder the mail's ability to be processed through existing postal machines and could lead to complications during delivery. Consequently, adhering to the specified size allows for efficient mail operations and enhances delivery success rates. Thus, understanding these criteria is essential for anyone involved in preparing mail for the USPS.

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5 x 7 inches

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