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Flat Rate Box to Australia
Priority Mail International® OptionsExpected Delivery DateRetailClick-N-Ship®
More info about Priority Mail International® Medium Flat Rate Box
USPS-Produced Box: 13-5/8" x 11-7/8" x 3-3/8" or 11" x 8-1/2" x 5-1/2"
Maximum weight 20 pounds.
6 - 10 business days to many major markets1,2

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1. Average performance to major markets.
2. Actual transit time may vary for origin and destination