USPS Priority Mail Flat Rate Options Are boxes free at USPS? The United States Postal Service offers Priority Mail flat rate shipping in three box sizes: Small: 8 ⅝” x 5 ⅜” x 1 ⅝” Medium: 13 ⅝” x 11 ⅞” x 11” or 11” x 8 ½” x 5 ½” Large: 23 11/16” x 11 ¾” x 12” or 12” 12” x 5 ½” What are the sizes of the flat rate boxes? You can send up to 4 lbs using Priority Mail International Flat Rate Envelopes and Small Flat Rate Boxes, and up to 20 lbs. There are two different box types to choose from: 12″ x 12″ x 5-1/2″ Inside and 12-1/4″ x 12-1/4″ x 6″ Outside. The USPS large flat rate box cost is $17.45 when you purchase the postage at a USPS retail outlet, or $15.80 if you get the postage online. How much is it to ship a large flat rate box? Priority Mail Small Flat Rate Box 8 5/8' x 5 3/8' x1 5/8' – Supplies Store.

Packages shipped via flat rate are sent via USPS Priority Mail.2

USPS Flat Rate shipping generally takes between one and three days, excluding Sunday, depending on package origin and its final destination. Outside Dimensions : 12 1⁄4″ x 12 1⁄4″ x 6″įlat Rate Shipping – UPS Simple Rate With UPS® Simple Rate, you pick from the five flat packaging rates and the four shipping speeds.Priority Mail® Flat Rate Options: Large Flat Rate Box.What is the largest flat rate box for USPS?

Cost of flat rate shipping boxes usps