USPS Country Groups
| Country | Country groups by service (not available if shaded) | ||||||
| IPA (4.4 lbs max for merchandise) | ISAL (4.4 lbs max for merchandise) | ePACKET (4.4 lbs max for merchandise) | PMEI Group | PMEI Max Wt. | PMI Group | PMI Max Wt. | |
| Afghanistan | 19 | 6 | 66 | ||||
| Albania | 16 | 16 | 4 | 66 | 4 | 44 | |
| Algeria | 19 | 19 | 8 | 44 | 8 | 44 | |
| Andorra | 15 | 5 | 66 | 5 | 66 | ||
| Angola | 19 | 19 | 7 | 44 | 7 | 44 | |
| Anguilla | 17 | 9 | 55 | 9 | 22 | ||
| Antigua and Barbuda | 17 | 9 | 22 | ||||
| Argentina | 10 | 10 | 9 | 44 | 9 | 44 | |
| Armenia | 19 | 4 | 44 | 4 | 44 | ||
| Aruba | 17 | 17 | 9 | 44 | 9 | 44 | |
| Ascension3 | 16 | ||||||
| Australia | 9 | 9 | 9 | 10 | 66 | 10 | 66 |
| Austria | 12 | 12 | 12 | 5 | 66 | 5 | 66 |
| Azerbaijan | 19 | 4 | 70 | 4 | 70 | ||
| Bahamas | 17 | 9 | 22 | 9 | 22 | ||
| Bahrain | 19 | 19 | 8 | 44 | 8 | 44 | |
| Bangladesh | 19 | 19 | 6 | 44 | 6 | 44 | |
| Barbados | 17 | 9 | 66 | 9 | 44 | ||
| Belarus | 16 | 4 | 44 | 4 | 66 | ||
| Belgium | 12 | 12 | 12 | 5 | 66 | 5 | 66 |
| Belize | 17 | 17 | 9 | 66 | 9 | 44 | |
| Benin | 19 | 19 | 7 | 66 | 7 | 66 | |
| Bermuda | 17 | 9 | 44 | 9 | 44 | ||
| Bhutan | 19 | 6 | 66 | 6 | 66 | ||
| Bolivia3 | 17 | 17 | 9 | 66 | |||
| Bonaire, Sint Eustatius, and Saba | 17 | 17 | 9 | 66 | 9 | 44 | |
| Bosnia-Herzegovina | 16 | 4 | 66 | 4 | 44 | ||
| Botswana | 19 | 7 | 66 | 7 | 66 | ||
| Brazil | 10 | 10 | 10 | 15 | 66 | 15 | 66 |
| British Virgin Islands | 17 | 9 | 44 | ||||
| Brunei Darussalam | 18 | 6 | 66 | 6 | 44 | ||
| Bulgaria | 16 | 16 | 4 | 66 | 4 | 70 | |
| Burkina Faso | 19 | 19 | 7 | 70 | 7 | 66 | |
| Burma | 19 | 6 | 44 | 6 | 22 | ||
| Burundi | 19 | 7 | 66 | 7 | 66 | ||
| Cambodia | 18 | 6 | 66 | 6 | 66 | ||
| Cameroon | 19 | 19 | 7 | 44 | 7 | 66 | |
| Canada | 1 | 1 | 1 | 1 | 66 | 1 | 66 |
| Cape Verde | 19 | 7 | 66 | 7 | 44 | ||
| Cayman Islands | 17 | 9 | 44 | 9 | 44 | ||
| Central African Republic | 19 | 19 | 7 | 66 | 7 | 66 | |
| Chad | 19 | 7 | 66 | 7 | 44 | ||
| Chile | 17 | 17 | 9 | 66 | 9 | 44 | |
| China | 14 | 14 | 14 | 66 | 14 | 66 | |
| Colombia | 17 | 17 | 9 | 44 | 9 | 66 | |
| Comoros | 19 | 7 | 44 | ||||
| Congo, Democratic Republic of the | 19 | 19 | 7 | 66 | 7 | 66 | |
| Congo, Republic of the | 19 | 7 | 66 | 7 | 44 | ||
| Costa Rica | 17 | 17 | 9 | 66 | 9 | 66 | |
| Cote d'Ivoire | 19 | 19 | 7 | 66 | 7 | 66 | |
| Croatia | 16 | 15 | 4 | 66 | 4 | 66 | |
| Cuba3 | |||||||
| Curacao | 17 | 17 | 9 | 66 | 9 | 44 | |
| Cyprus | 19 | 4 | 70 | 4 | 70 | ||
| Czech Republic | 16 | 16 | 4 | 70 | 4 | 70 | |
| Denmark | 12 | 12 | 12 | 5 | 66 | 5 | 66 |
| Djibouti | 19 | 7 | 44 | 7 | 44 | ||
| Dominica | 17 | 9 | 44 | 9 | 44 | ||
| Dominican Republic | 17 | 17 | 9 | 66 | 9 | 44 | |
| Ecuador | 17 | 17 | 9 | 66 | 9 | 66 | |
| Egypt | 19 | 19 | 8 | 44 | 8 | 66 | |
| El Salvador | 17 | 17 | 9 | 66 | 9 | 44 | |
| Equatorial Guinea | 19 | 7 | 44 | 7 | 22 | ||
| Eritrea | 19 | 7 | 66 | 7 | 44 | ||
| Estonia | 16 | 15 | 4 | 66 | 4 | 70 | |
| Ethiopia | 19 | 19 | 8 | 66 | 8 | 66 | |
| Falkland Islands3 | 17 | ||||||
| Faroe Islands | 16 | 5 | 44 | 5 | 70 | ||
| Fiji | 18 | 18 | 6 | 66 | 6 | 44 | |
| Finland | 12 | 12 | 12 | 5 | 66 | 5 | 70 |
| France | 5 | 5 | 5 | 13 | 66 | 13 | 66 |
| French Guiana | 17 | 17 | 9 | 66 | 9 | 66 | |
| French Polynesia | 18 | 6 | 66 | 6 | 66 | ||
| Gabon | 19 | 19 | 7 | 66 | 7 | 44 | |
| Gambia | 19 | 7 | 66 | ||||
| Georgia, Republic of | 19 | 4 | 66 | 4 | 44 | ||
| Germany | 4 | 4 | 4 | 16 | 66 | 16 | 70 |
| Ghana | 19 | 19 | 7 | 66 | 7 | 66 | |
| Gibraltar | 15 | 15 | 5 | 44 | |||
| Great Britain and Northern Ireland | 3 | 3 | 3 | 11 | 66 | 11 | 66 |
| Greece | 13 | 13 | 13 | 5 | 66 | 5 | 44 |
| Greenland | 15 | 5 | 66 | ||||
| Grenada | 17 | 9 | 66 | 9 | 44 | ||
| Guadeloupe | 17 | 9 | 66 | 9 | 66 | ||
| Guatemala | 17 | 17 | 9 | 66 | 9 | 44 | |
| Guinea | 19 | 7 | 44 | 7 | 66 | ||
| Guinea-Bissau | 19 | 7 | 44 | 7 | 66 | ||
| Guyana | 17 | 17 | 9 | 66 | 9 | 44 | |
| Haiti | 17 | 17 | 9 | 66 | 9 | 55 | |
| Honduras | 17 | 17 | 9 | 44 | 9 | 44 | |
| Hong Kong | 11 | 11 | 11 | 3 | 66 | 3 | 66 |
| Hungary | 16 | 16 | 15 | 4 | 66 | 4 | 44 |
| Iceland | 15 | 15 | 5 | 66 | 5 | 70 | |
| India | 14 | 14 | 6 | 70 | 6 | 44 | |
| Indonesia | 18 | 18 | 6 | 66 | 6 | 44 | |
| Iran | |||||||
| Iraq | 19 | 8 | 44 | 8 | 44 | ||
| Ireland | 13 | 13 | 13 | 5 | 66 | 5 | 66 |
| Israel | 13 | 13 | 13 | 8 | 44 | 8 | 44 |
| Italy | 7 | 7 | 7 | 5 | 66 | 5 | 66 |
| Jamaica | 17 | 17 | 9 | 66 | 9 | 22 | |
| Japan | 6 | 6 | 12 | 66 | 12 | 66 | |
| Jordan | 19 | 19 | 8 | 66 | 8 | 66 | |
| Kazakhstan | 19 | 6 | 66 | 6 | 44 | ||
| Kenya | 19 | 19 | 7 | 70 | 7 | 70 | |
| Kiribati | 18 | 6 | 66 | 6 | 44 | ||
| Korea, Democratic Peoples Republic of (North Korea)4 | |||||||
| Korea, Republic of (South Korea) | 11 | 11 | 11 | 3 | 66 | 3 | 44 |
| Kosovo, Republic of | 16 | 5 | 70 | ||||
| Kuwait | 19 | 19 | 8 | 66 | 8 | 66 | |
| Kyrgyzstan | 16 | 6 | 66 | 6 | 44 | ||
| Laos | 18 | 6 | 66 | 6 | 44 | ||
| Latvia | 16 | 15 | 4 | 66 | 4 | 70 | |
| Lebanon | 19 | 19 | 8 | 66 | 8 | 66 | |
| Lesotho | 19 | 7 | 66 | 7 | 44 | ||
| Liberia | 19 | 7 | 44 | 7 | 44 | ||
| Libya | 19 | 8 | 44 | ||||
| Liechtenstein | 15 | 15 | 5 | 66 | 5 | 66 | |
| Lithuania | 16 | 15 | 4 | 70 | 4 | 70 | |
| Luxembourg | 15 | 15 | 15 | 5 | 66 | 5 | 66 |
| Macao | 16 | 6 | 44 | 6 | 70 | ||
| Macedonia, Republic of | 16 | 4 | 66 | 4 | 70 | ||
| Madagascar | 19 | 19 | 7 | 66 | 7 | 44 | |
| Malawi | 19 | 7 | 44 | 7 | 66 | ||
| Malaysia | 18 | 18 | 15 | 6 | 66 | 6 | 66 |
| Maldives | 19 | 6 | 66 | 6 | 66 | ||
| Mali | 19 | 19 | 7 | 66 | 7 | 66 | |
| Malta | 19 | 15 | 5 | 44 | 5 | 66 | |
| Martinique | 17 | 9 | 66 | 9 | 66 | ||
| Mauritania | 19 | 19 | 7 | 66 | 7 | 44 | |
| Mauritius | 19 | 19 | 7 | 66 | 7 | 44 | |
| Mexico | 2 | 2 | 2 | 70 | 2 | 70 | |
| Moldova | 19 | 4 | 70 | 4 | 70 | ||
| Mongolia | 18 | 6 | 66 | 6 | 66 | ||
| Montenegro | 17 | 5 | 70 | ||||
| Montserrat | 17 | 9 | 44 | ||||
| Morocco | 19 | 19 | 8 | 68 | 8 | 66 | |
| Mozambique | 19 | 19 | 7 | 66 | 7 | 66 | |
| Namibia | 19 | 7 | 22 | 7 | 44 | ||
| Nauru | 18 | 6 | 44 | 6 | 44 | ||
| Nepal | 18 | 6 | 69 | 6 | 44 | ||
| Netherlands | 12 | 12 | 12 | 17 | 66 | 17 | 66 |
| New Caledonia | 18 | 6 | 66 | 6 | 66 | ||
| New Zealand | 9 | 9 | 9 | 10 | 66 | 10 | 66 |
| Nicaragua | 17 | 17 | 9 | 55 | 9 | 66 | |
| Niger | 19 | 19 | 7 | 70 | 7 | 70 | |
| Nigeria | 19 | 19 | 7 | 66 | 7 | 66 | |
| Norway | 12 | 12 | 5 | 66 | 5 | 66 | |
| Oman | 19 | 19 | 8 | 66 | 8 | 44 | |
| Pakistan | 19 | 19 | 6 | 66 | 6 | 70 | |
| Panama | 17 | 17 | 9 | 66 | 9 | 70 | |
| Papua New Guinea | 18 | 18 | 6 | 55 | 6 | 44 | |
| Paraguay | 17 | 17 | 9 | 55 | 9 | 66 | |
| Peru | 17 | 17 | 9 | 70 | 9 | 70 | |
| Philippines | 14 | 14 | 6 | 44 | 6 | 44 | |
| Pitcairn Island | 18 | 6 | 22 | ||||
| Poland | 12 | 12 | 12 | 4 | 44 | 4 | 44 |
| Portugal | 13 | 13 | 13 | 5 | 66 | 5 | 66 |
| Qatar | 19 | 19 | 8 | 66 | 8 | 70 | |
| Reunion | 19 | 19 | 9 | 66 | |||
| Romania | 16 | 16 | 4 | 70 | 4 | 70 | |
| Russia | 16 | 16 | 15 | 4 | 70 | 4 | 44 |
| Rwanda | 19 | 7 | 66 | 7 | 66 | ||
| Saint Helena | 19 | 7 | 44 | ||||
| Saint Kitts and Nevis | 17 | 9 | 66 | 9 | 44 | ||
| Saint Lucia | 17 | 9 | 44 | 9 | 44 | ||
| Saint Pierre and Miquelon | 17 | 4 | 66 | ||||
| Saint Vincent and the Grenadines | 17 | 9 | 44 | 9 | 22 | ||
| Samoa | 18 | 6 | 44 | 6 | 44 | ||
| San Marino | 12 | 5 | 66 | 5 | 66 | ||
| Sao Tome and Principe | 16 | 7 | 66 | 7 | 44 | ||
| Saudi Arabia | 19 | 19 | 8 | 66 | 8 | 66 | |
| Senegal | 19 | 19 | 7 | 66 | 7 | 66 | |
| Serbia, Republic of | 16 | 5 | 66 | 5 | 70 | ||
| Seychelles | 19 | 7 | 66 | 7 | 70 | ||
| Sierra Leone | 19 | 7 | 66 | 7 | 66 | ||
| Singapore | 11 | 11 | 11 | 6 | 66 | 6 | 66 |
| Sint Maarten | 17 | 17 | 9 | 66 | 9 | 44 | |
| Slovak Republic (Slovakia) | 16 | 16 | 5 | 66 | 5 | 66 | |
| Slovenia | 13 | 5 | 66 | 5 | 66 | ||
| Solomon Islands | 18 | 6 | 66 | 6 | 44 | ||
| Somalia | |||||||
| South Africa | 14 | 14 | 7 | 66 | 7 | 66 | |
| Spain | 8 | 8 | 8 | 5 | 66 | 5 | 44 |
| Sri Lanka | 19 | 19 | 6 | 66 | 6 | 66 | |
| Sudan | 7 | 66 | 7 | 44 | |||
| Suriname | 17 | 17 | 9 | 44 | |||
| Swaziland | 19 | 7 | 66 | 7 | 44 | ||
| Sweden | 12 | 12 | 12 | 5 | 66 | 5 | 66 |
| Switzerland | 12 | 12 | 12 | 5 | 66 | 5 | 66 |
| Syrian Arab Republic | |||||||
| Taiwan | 14 | 14 | 6 | 33 | 6 | 44 | |
| Tajikistan | 19 | 6 | 66 | 6 | 66 | ||
| Tanzania | 19 | 19 | 7 | 66 | 7 | 66 | |
| Thailand | 14 | 14 | 6 | 66 | 6 | 66 | |
| Timor-Leste Democratic Republic of | 18 | 18 | 6 | 44 | |||
| Togo | 19 | 19 | 7 | 66 | 7 | 70 | |
| Tonga | 18 | 6 | 66 | 6 | 44 | ||
| Trinidad and Tobago | 17 | 17 | 9 | 66 | 9 | 44 | |
| Tristan da Cunha | 19 | 7 | 22 | ||||
| Tunisia | 19 | 19 | 8 | 66 | 8 | 66 | |
| Turkey | 16 | 16 | 4 | 66 | 4 | 66 | |
| Turkmenistan | 16 | 6 | 66 | 6 | 44 | ||
| Turks and Caicos Islands | 17 | 9 | 66 | 9 | 44 | ||
| Tuvalu | 18 | 6 | 55 | ||||
| Uganda | 19 | 19 | 7 | 66 | 7 | 66 | |
| Ukraine | 19 | 4 | 44 | 4 | 66 | ||
| United Arab Emirates | 19 | 19 | 8 | 70 | 8 | 70 | |
| Uruguay | 17 | 17 | 9 | 44 | 9 | 66 | |
| Uzbekistan | 19 | 6 | 66 | 6 | 70 | ||
| Vanuatu | 18 | 6 | 55 | 6 | 44 | ||
| Vatican City | 15 | 5 | 66 | 5 | 44 | ||
| Venezuela | 17 | 17 | 9 | 66 | 9 | 66 | |
| Vietnam | 18 | 6 | 66 | 6 | 70 | ||
| Wallis and Futuna Islands | 18 | 6 | 66 | ||||
| Yemen | |||||||
| Zambia | 19 | 19 | 7 | 66 | 7 | 66 | |
| Zimbabwe | 19 | 19 | 7 | 44 | 7 | 44 | |
Service is not available.
1 Priority Mail Express International Flat Rate Envelopes maximum weight: 4 lbs.
2 Priority Mail International Flat Rate Service maximum weights: Flat Rate Envelopes and Small Flat Rate Priced Boxes, 4lbs.; Medium and Large Flat Rate Boxes, 20 lbs.
3 Ascension, Bolivia, Cuba, and the Falkland Islands: Only Priority Mail International Flat Rate Envelopes and Small Flat Rate Priced Boxes (maximum weight: 4 lbs. each) may be used.
4 Korea, Democratic People's Republic of (North Korea): Only Priority Mail International Flat Rate Envelopes (maximum weight: 4 lbs.) may be used. Dutiable items and merchandise are prohibited.
NOTE: Refer to the USPS International Mail Manual for the most current information and regulations. Mailing Standards of the United States Postal Service, International Mail Manual.