Package Sizes and Dimensions - USPS International | Overview

When shipping with USPS, packages must meet weight and size limits. The following tables detail international package types offered through the USPS.

Many of these supplies can be ordered for free through USPS.

Keep in mind that some packages are also subject to minimum dimensions. For instance:

First-Class Package Rolls may be no smaller in length than 4", and the length plus twice the diameter combined may be no smaller than 6-3/4". Learn more about First-Class Package International Service limitations.
Priority Mail parcels must have one side large enough to accommodate, postage, and the PS Form 2976-E (envelope for customs label), approximately 10-1/4" wide and 7-1/4" high. Learn more about Priority Mail International limitations.

Package Type	Service	Max Weight	Max Dimensions*
Package	First-Class Package Service	4 lbs	24" Length, L+H+W= 36"
	Priority Mail	4-70 lbs (varies by country)	Length + Girth** < 108" (varies by country)
	Priority Mail Express	22-70 lbs (varies by country)	Length + Girth** < 79" (varies by country)
Flat Rate Small Box	Priority Mail	4 lbs	8 5/8" x 5 3/8" x 1 5/8"
Flat Rate Medium Box	Priority Mail	20 lbs	13 5/8" x 11 7/8" x 3 3/8"
Flat Rate Large Box	Priority Mail	20 lbs	12" x 12" x 5 1/2"

**Girth is a special dimensional measurement, equal to (2 x width) + (2 x height). Learn more about shipment dimensions.

Envelope Type	Service	Max Weight	Max Dimensions
Letter	First-Class Mail	3.5 oz	11 1/2" L x 1/4"W x 6 1/8" H
Flat Rate Envelope	Priority Mail Priority Mail Express	4 lbs	12 1/2" x 9 1/2"
Flat Rate Padded Envelope	Priority Mail Priority Mail Express	4 lbs	12 1/2" x 9 1/2"
Flat Rate Legal Envelope	Priority Mail Priority Mail Express	4 lbs	15" x 9 1/2"

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