The United States Postal Service (USPS) offers a variety of box sizes for shipping. Some of the most common box sizes available through USPS include: – Small Flat Rate Box: 8 11/16″ x 5 7/16″ x 1 3/4″– Medium Flat Rate Box: 11 1/4″ x 8 3/4″ x 6″– Large Flat Rate Box: 12 1/4″… Continue reading what size boxes does usps have?
