Priority Mail Flat Rate Large Boxes

When sealing a flat-rate box or flat-rate envelope, the container flaps must be able to close within the normal folds. Tape may be applied to the flaps and seams to reinforce the container, provided the design of the container is not enlarged by opening the sides and the container is not reconstructed in any way.

Sizes: 12 inches long, 12 inches long and 6 inches thick

Price - Domestic:

Domestic Military APO/FPO destination ZIP Codes: $10.95
All other destination ZIP Codes: $12.95
Regardless of weight for items mailed in the Priority Mail Large Flat Rate Boxes provided by the Postal Service.

Price - International:

Canada and Mexico: $29.95
All other international destinations: $49.95
Online 5% discount available through Click-N-Ship to international destinations. Weight limit is 20 pounds to international destinations for items mailed in the Priority Mail Large Flat Rate Boxes provided by the Postal Service.

APO/FPO Priority Mail Large Flat Rate Box

The APO/FPO box can be identified buy the two markings, "APO/FPO Flat Rate Box" and "Americasupportsyou.mil." The price for this box to APO/FPO destination addresses is $10.95 or $12.95 when sent to domestic addresses. This box can also be used for international destinations. 

General Priority Mail Large Flat Rate Box

The box can be identified buy the marking, "Large Flat Rate Box." The price for the box to non APO/FPO destination addresses is $12.95 or $10.95 when sent to APO/FPO addresses. This box can also be used for international destinations.