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Using First Class Mail International, deliveries generally take between 7â21 days to arrive, although the USPS does not guarantee delivery dates or times. Mail may travel to its destination by ground, air or a combination of both.
priority mail international offers 6 10 day service to most international destinations priority mail international is a usps trademark note the cost of postage will appear on all international shipping labels the maximum weight for flat rate envelopes and small boxes is 4 pounds