Due to holiday mail volume, please allow an additional 1 to 2 days for the delivery of your order.
For more information, please visit the Shipping Page.
Please Note: This product ships in Single Boxes (1-5), and packs of 10 or 25 boxes. An order of 1 equals (1-5) single boxes, a pack of 10 or 25 boxes depending on your selection under Format.
The Priority Mail® Medium Flat Rate Box - 1 is a quick, easy, and convenient way for you to ship USPS Priority Mail® packages. The Priority Mail® Medium Flat Rate Box features predetermined rates regardless of weight (domestically) or destination, similar to the Flat Rate Envelope.
Inside Dimensions: 11" x 8-1/2" x 5-1/2"
Outside Dimensions: 11-1/4" x 8-3/4" x 6"
- Can be used for Domestic Priority Mail and International Priority Mail (20 lb weight limit applies).
SKUs featured on this page: P_O_FRB1l, P_O_FRB1X, P_O_FRB1
11 in x 8-1/2 in x 5-1/2 in
The Postal Store® ships all in-stock orders with USPS Tracking™.. Please allow 5 - 7 business days for in-stock items to be shipped.
The Postal Store® cannot accept orders for shipment outside the United States, but we do ship to APO/FPO/DPO addresses and U.S. territories. Learn More
Stamp and Philatelic Orders
All stamp and philatelic orders are charged a $1.30 Handling Fee on domestic orders of up to $50.00, and $1.80 if the order is greater than $50. These fixed handling fees apply to only the portion of the order total that is stamp and philatelic products.
Personalized Stamped Stationery
All Personalized Stamped Stationery products are charged a flat Priority Mail rate depending on how many boxes are ordered as specified in the PSE Shipping Charges table, and should be shipped within 5-7 business days.
Free shipping supplies
Free shipping supplies from The Postal Store Shipping Supply site are mailed Standard Post™ and are shipped within 3-5 business days. For your convenience all orders will contain a carrier release endorsement "Leave if No Response". This will allow your postal carrier to leave your expedited packaging supply order if you are not available to receive the delivery.
Expedited Shipping Supplies
If your local Post Office is unable to fulfill your order of Expedited Shipping Supplies within 1-2 business days, your order will be fulfilled by our distribution center within 3-5 business days.
Pre- or Back-ordered Items
If your order contains pre- or back-ordered items, all in-stock products will ship within 5-7 business days and any pre- or back-ordered items will ship separately as they become available.