USPS Country Groups
| Countries | Priority Mail Express Intl (PMEI) | Priority Mail Intl (PMI) | First Class Int (4 lb max) | IMS Consolidation Services (4.4 lb max) | |||||
| Group | Max lbs | Group | Max lbs | Ltrs/Flts | Pkgs | IPA | ISAL | ePacket | |
| Afghanistan | n/a | n/a | 7 | 66 | 6 | 4 | 4 | 4 | n/a |
| Albania | 3 | 66 | 3 | 44 | 4 | 3 | 3 | 3 | n/a |
| Algeria | 9 | 44 | 9 | 44 | 8 | 5 | 5 | 5 | n/a |
| Andorra | 4 | 66 | 4 | 66 | 5 | 3 | 3 | 3 | n/a |
| Angola | 8 | 44 | 8 | 44 | 7 | 5 | 5 | 5 | n/a |
| Anguilla | 10 | 55 | 10 | 22 | 9 | 6 | 6 | 6 | n/a |
| Antigua and Barbuda | n/a | n/a | 10 | 22 | 9 | 6 | 6 | 6 | n/a |
| Argentina | 10 | 44 | 10 | 44 | 9 | 11 | 11 | 11 | n/a |
| Armenia | 3 | 44 | 3 | 44 | 4 | 3 | 3 | 3 | n/a |
| Aruba | 11 | 44 | 11 | 44 | 9 | 6 | 6 | 6 | n/a |
| Ascension | n/a | n/a | n/a | n/a | 7 | 5 | 5 | 5 | n/a |
| Australia | 12 | 66 | 12 | 66 | 3 | 12 | 12 | 12 | 12 |
| Austria | 4 | 66 | 4 | 66 | 5 | 9 | 9 | 9 | n/a |
| Azerbaijan | 3 | 79 | 3 | 70 | 4 | 3 | 3 | 3 | n/a |
| Bahamas | 10 | 22 | 10 | 22 | 9 | 6 | 6 | 6 | n/a |
| Bahrain | 6 | 44 | 6 | 44 | 8 | 4 | 4 | 4 | n/a |
| Bangladesh | 6 | 44 | 6 | 44 | 6 | 4 | 4 | 4 | n/a |
| Barbados | 10 | 66 | 10 | 44 | 9 | 6 | 6 | 6 | n/a |
| Belarus | 3 | 44 | 3 | 66 | 4 | 3 | 3 | 3 | n/a |
| Belgium | 4 | 66 | 4 | 66 | 5 | 9 | 9 | 9 | 9 |
| Belize | 10 | 66 | 10 | 44 | 9 | 6 | 6 | 6 | n/a |
| Benin | 9 | 66 | 9 | 66 | 7 | 5 | 5 | 5 | n/a |
| Bermuda | 10 | 44 | 10 | 44 | 9 | 6 | 6 | 6 | n/a |
| Bhutan | 7 | 66 | 7 | 66 | 6 | 4 | 4 | 4 | n/a |
| Bolivia | 11 | 66 | n/a | n/a | 9 | 6 | 6 | 6 | n/a |
| Bonaire, Sint Eustatius, Saba | 10 | 66 | 10 | 44 | 9 | 6 | 6 | 6 | n/a |
| Bosnia-Herzegovina | 3 | 66 | 3 | 44 | 4 | 3 | 3 | 3 | n/a |
| Botswana | 9 | 66 | 9 | 66 | 7 | 5 | 5 | 5 | n/a |
| Brazil | 13 | 66 | 13 | 66 | 9 | 13 | 13 | 13 | n/a |
| British Virgin Islands | n/a | n/a | 10 | 44 | 9 | 6 | 6 | 6 | n/a |
| Brunei Darussalam | 6 | 66 | 6 | 44 | 6 | 4 | 4 | 4 | n/a |
| Bulgaria | 3 | 66 | 3 | 70 | 4 | 3 | 3 | 3 | n/a |
| Burkina Faso | 9 | 70 | 9 | 66 | 7 | 5 | 5 | 5 | n/a |
| Burma | 6 | 44 | 6 | 22 | 6 | 4 | 4 | 4 | n/a |
| Burundi | 8 | 66 | 8 | 66 | 7 | 5 | 5 | 5 | n/a |
| Cambodia | 6 | 66 | 6 | 66 | 6 | 4 | 4 | 4 | n/a |
| Cameroon | 9 | 44 | 9 | 66 | 7 | 5 | 5 | 5 | n/a |
| Canada | 1 | 66 | 1 | 66 | 1 | 1 | 1 | 1 | 1 |
| Cape Verde | 8 | 66 | 8 | 44 | 7 | 5 | 5 | 5 | n/a |
| Cayman Islands | 11 | 44 | 11 | 44 | 9 | 6 | 6 | 6 | n/a |
| Cent African Rep | 9 | 66 | 9 | 66 | 7 | 5 | 5 | 5 | n/a |
| Chad | 8 | 66 | 8 | 44 | 7 | 5 | 5 | 5 | n/a |
| Chile | 11 | 66 | 11 | 44 | 9 | 11 | 11 | 11 | n/a |
| China | 14 | 66 | 14 | 66 | 3 | 14 | 14 | 14 | n/a |
| Colombia | 10 | 44 | 10 | 66 | 9 | 6 | 6 | 6 | n/a |
| Comoros Islands | n/a | n/a | 8 | 44 | 7 | 5 | 5 | 5 | n/a |
| Congo, Dem Republic of the | 9 | 66 | 9 | 66 | 7 | 5 | 5 | 5 | n/a |
| Congo, Republic of | 8 | 66 | 8 | 44 | 7 | 5 | 5 | 5 | n/a |
| Costa Rica | 11 | 66 | 11 | 66 | 9 | 6 | 6 | 6 | n/a |
| Cote d’Ivoire | 8 | 66 | 8 | 66 | 7 | 5 | 5 | 5 | n/a |
| Croatia | 3 | 66 | 3 | 66 | 4 | 8 | 8 | 8 | 8 |
| Cuba | 11 | 22 | 11 | 22 | 9 | 6 | 6 | 6 | n/a |
| Curacao | 11 | 66 | 11 | 44 | 9 | 6 | 6 | 6 | n/a |
| Cyprus | 7 | 70 | 7 | 70 | 4 | 4 | 4 | 4 | n/a |
| Czech Republic | 3 | 70 | 3 | 70 | 4 | 7 | 7 | 7 | n/a |
| Denmark | 4 | 66 | 4 | 66 | 5 | 9 | 9 | 9 | 9 |
| Djibouti | 9 | 44 | 9 | 44 | 7 | 5 | 5 | 5 | n/a |
| Dominica | 11 | 44 | 11 | 44 | 9 | 6 | 6 | 6 | n/a |
| Dominican Rpblc | 11 | 66 | 11 | 44 | 9 | 6 | 6 | 6 | n/a |
| Ecuador | 10 | 66 | 10 | 66 | 9 | 6 | 6 | 6 | n/a |
| Egypt | 8 | 44 | 8 | 66 | 8 | 5 | 5 | 5 | n/a |
| El Salvador | 11 | 66 | 11 | 44 | 9 | 6 | 6 | 6 | n/a |
| Equatorial Guinea | 8 | 44 | 8 | 22 | 7 | 5 | 5 | 5 | n/a |
| Eritrea | 9 | 66 | 9 | 44 | 7 | 5 | 5 | 5 | n/a |
| Estonia | 3 | 66 | 3 | 70 | 4 | 9 | 9 | 9 | 9 |
| Eswatini | 8 | 66 | 8 | 44 | 7 | 5 | 5 | 5 | n/a |
| Ethiopia | 9 | 66 | 9 | 66 | 8 | 5 | 5 | 5 | n/a |
| Falkland Islands | n/a | n/a | n/a | n/a | 9 | 6 | 6 | 6 | n/a |
| Faroe Islands | 5 | 44 | 5 | 70 | 5 | 9 | 9 | 9 | n/a |
| Fiji | 6 | 66 | 6 | 44 | 6 | 4 | 4 | 4 | n/a |
| Finland | 4 | 66 | 4 | 70 | 5 | 9 | 9 | 9 | n/a |
| France | 15 | 66 | 15 | 66 | 5 | 15 | 15 | 15 | 15 |
| French Guiana | 11 | 66 | 11 | 66 | 9 | 15 | 15 | 15 | n/a |
| French Polynesia (& Tahiti) | 7 | 66 | 7 | 66 | 6 | 4 | 4 | 4 | n/a |
| Gabon | 8 | 66 | 8 | 44 | 7 | 5 | 5 | 5 | n/a |
| Gambia | n/a | n/a | 8 | 66 | 7 | 5 | 5 | 5 | n/a |
| Georgia, Republic | 3 | 66 | 3 | 44 | 4 | 3 | 3 | 3 | n/a |
| Germany | 16 | 66 | 16 | 70 | 5 | 16 | 16 | 16 | 16 |
| Ghana | 9 | 66 | 9 | 66 | 7 | 5 | 5 | 5 | n/a |
| Gibraltar | n/a | n/a | 4 | 44 | 5 | 7 | 7 | 7 | 7 |
| Greece | 4 | 66 | 4 | 44 | 5 | 8 | 8 | 8 | n/a |
| Greenland | n/a | n/a | 5 | 66 | 5 | 9 | 9 | 9 | n/a |
| Grenada | 10 | 66 | 10 | 44 | 9 | 6 | 6 | 6 | n/a |
| Guadeloupe | 11 | 66 | 11 | 66 | 9 | 15 | 15 | 15 | n/a |
| Guatemala | 10 | 66 | 10 | 44 | 9 | 6 | 6 | 6 | n/a |
| Guinea | 8 | 44 | 8 | 66 | 7 | 5 | 5 | 5 | n/a |
| Guinea-Bissau | 9 | 44 | 9 | 66 | 7 | 5 | 5 | 5 | n/a |
| Guyana | 11 | 66 | 11 | 44 | 9 | 6 | 6 | 6 | n/a |
| Haiti | 10 | 66 | 10 | 55 | 9 | 6 | 6 | 6 | n/a |
| Honduras | 11 | 44 | 11 | 44 | 9 | 6 | 6 | 6 | n/a |
| Hong Kong | 18 | 66 | 18 | 66 | 3 | 18 | 18 | 18 | 18 |
| Hungary | 3 | 66 | 3 | 44 | 4 | 7 | 7 | 7 | n/a |
| Iceland | 5 | 66 | 5 | 70 | 5 | 7 | 7 | 7 | n/a |
| India | 6 | 70 | 6 | 44 | 6 | 10 | 10 | 10 | n/a |
| Indonesia | 6 | 66 | 6 | 44 | 6 | 4 | 4 | 4 | n/a |
| Iran | n/a | n/a | 7 | 44 | 8 | 4 | 4 | 4 | n/a |
| Iraq | 6 | 44 | 6 | 44 | 8 | 4 | 4 | 4 | n/a |
| Ireland | 4 | 66 | 4 | 66 | 5 | 9 | 9 | 9 | 9 |
| Israel | 4 | 44 | 4 | 44 | 5 | 8 | 8 | 8 | 8 |
| Italy | 4 | 66 | 4 | 66 | 5 | 9 | 9 | 9 | n/a |
| Jamaica | 11 | 66 | 11 | 22 | 9 | 6 | 6 | 6 | n/a |
| Japan | 17 | 66 | 17 | 66 | 3 | 17 | 17 | 17 | 17 |
| Jordan | 7 | 66 | 7 | 66 | 8 | 4 | 4 | 4 | n/a |
| Kazakhstan | 7 | 66 | 7 | 44 | 6 | 4 | 4 | 4 | n/a |
| Kenya | 9 | 70 | 9 | 70 | 7 | 5 | 5 | 5 | n/a |
| Kiribati | 6 | 66 | 6 | 44 | 6 | 4 | 4 | 4 | n/a |
| Korea, North | n/a | n/a | n/a | n/a | 6 | 4 | 4 | 4 | n/a |
| Korea, Republic of | 18 | 66 | 18 | 44 | 3 | 18 | 18 | 18 | 18 |
| Kosovo, Republic of | n/a | n/a | 3 | 70 | 5 | 3 | 3 | 3 | n/a |
| Kuwait | 6 | 66 | 6 | 66 | 8 | 4 | 4 | 4 | n/a |
| Kyrgyzstan | 7 | 66 | 7 | 44 | 6 | 4 | 4 | 4 | n/a |
| Laos | 6 | 66 | 6 | 44 | 6 | 4 | 4 | 4 | n/a |
| Latvia | 3 | 66 | 3 | 70 | 4 | 3 | 3 | 3 | n/a |
| Lebanon | 6 | 66 | 6 | 66 | 8 | 4 | 4 | 4 | 4 |
| Lesotho | 9 | 66 | 9 | 44 | 7 | 5 | 5 | 5 | n/a |
| Liberia | 9 | 44 | 9 | 44 | 7 | 5 | 5 | 5 | n/a |
| Libya | n/a | n/a | 9 | 44 | 8 | 5 | 5 | 5 | n/a |
| Liechtenstein | 4 | 66 | 4 | 66 | 5 | 7 | 7 | 7 | n/a |
| Lithuania | 3 | 70 | 3 | 70 | 4 | 7 | 7 | 7 | 7 |
| Luxembourg | 4 | 66 | 4 | 66 | 5 | 8 | 8 | 8 | 8 |
| Macao | 6 | 44 | 6 | 70 | 6 | 4 | 4 | 4 | n/a |
| Madagascar | 9 | 66 | 9 | 44 | 7 | 5 | 5 | 5 | n/a |
| Malawi | 9 | 44 | 9 | 66 | 7 | 5 | 5 | 5 | n/a |
| Malaysia | 7 | 66 | 7 | 66 | 6 | 10 | 10 | 10 | 10 |
| Maldives | 6 | 66 | 6 | 66 | 6 | 4 | 4 | 4 | n/a |
| Mali | 8 | 66 | 8 | 66 | 7 | 5 | 5 | 5 | n/a |
| Malta | 5 | 44 | 5 | 66 | 5 | 3 | 3 | 3 | n/a |
| Martinique | 11 | 66 | 11 | 66 | 9 | 15 | 15 | 15 | n/a |
| Mauritania | 8 | 66 | 8 | 44 | 7 | 5 | 5 | 5 | n/a |
| Mauritius | 8 | 66 | 8 | 44 | 7 | 5 | 5 | 5 | n/a |
| Mexico | 2 | 70 | 2 | 70 | 2 | 2 | 2 | 2 | n/a |
| Moldova | 3 | 70 | 3 | 70 | 4 | 3 | 3 | 3 | n/a |
| Mongolia | 7 | 66 | 7 | 66 | 6 | 4 | 4 | 4 | n/a |
| Montenegro | n/a | n/a | 3 | 70 | 5 | 3 | 3 | 3 | n/a |
| Montserrat | n/a | n/a | 10 | 44 | 9 | 6 | 6 | 6 | n/a |
| Morocco | 9 | 68 | 9 | 66 | 8 | 5 | 5 | 5 | n/a |
| Mozambique | 9 | 66 | 9 | 66 | 7 | 5 | 5 | 5 | n/a |
| Namibia | 8 | 22 | 8 | 44 | 7 | 5 | 5 | 5 | n/a |
| Nauru | 6 | 44 | 6 | 44 | 6 | 4 | 4 | 4 | n/a |
| Nepal | 6 | 69 | 6 | 44 | 6 | 4 | 4 | 4 | n/a |
| Netherlands | 4 | 66 | 4 | 66 | 5 | 9 | 9 | 9 | 9 |
| New Caledonia | 7 | 66 | 7 | 66 | 6 | 4 | 4 | 4 | n/a |
| New Zealand | 12 | 66 | 12 | 66 | 6 | 12 | 12 | 12 | 12 |
| Nicaragua | 10 | 55 | 10 | 66 | 9 | 6 | 6 | 6 | n/a |
| Niger | 9 | 70 | 9 | 70 | 7 | 5 | 5 | 5 | n/a |
| Nigeria | 9 | 66 | 9 | 66 | 7 | 5 | 5 | 5 | n/a |
| North Macedonia, Republic of | 3 | 66 | 3 | 70 | 4 | 3 | 3 | 3 | n/a |
| Norway | 5 | 66 | 5 | 66 | 5 | 9 | 9 | 9 | n/a |
| Oman | 6 | 66 | 6 | 44 | 8 | 4 | 4 | 4 | n/a |
| Pakistan | 6 | 66 | 6 | 70 | 6 | 4 | 4 | 4 | n/a |
| Panama | 11 | 66 | 11 | 70 | 9 | 6 | 6 | 6 | n/a |
| Papua New Guinea | 7 | 55 | 7 | 44 | 6 | 4 | 4 | 4 | n/a |
| Paraguay | 10 | 55 | 10 | 66 | 9 | 6 | 6 | 6 | n/a |
| Peru | 11 | 70 | 11 | 70 | 9 | 6 | 6 | 6 | n/a |
| Philippines | 6 | 44 | 6 | 44 | 6 | 4 | 4 | 4 | n/a |
| Pitcairn Island | n/a | n/a | 6 | 22 | 6 | 4 | 4 | 4 | n/a |
| Poland | 3 | 44 | 3 | 44 | 4 | 7 | 7 | 7 | 7 |
| Portugal | 4 | 66 | 4 | 66 | 5 | 7 | 7 | 7 | 7 |
| Qatar | 7 | 66 | 7 | 70 | 8 | 4 | 4 | 4 | n/a |
| Reunion | n/a | n/a | 8 | 66 | 9 | 15 | 15 | 15 | n/a |
| Romania | 3 | 70 | 3 | 70 | 4 | 3 | 3 | 3 | n/a |
| Russia | 19 | 70 | 19 | 44 | 4 | 19 | 19 | 19 | n/a |
| Rwanda | 9 | 66 | 9 | 66 | 7 | 5 | 5 | 5 | n/a |
| Saint Helena | n/a | n/a | 9 | 44 | 7 | 5 | 5 | 5 | n/a |
| Saint Kitts and Nevis | 10 | 66 | 10 | 44 | 9 | 6 | 6 | 6 | n/a |
| Saint Lucia | 11 | 44 | 11 | 44 | 9 | 6 | 6 | 6 | n/a |
| Saint Pierre and Miquelon | n/a | n/a | 4 | 66 | 4 | 3 | 3 | 3 | n/a |
| Saint Vincent and the Grenadines | 10 | 44 | 10 | 22 | 9 | 6 | 6 | 6 | n/a |
| Samoa | 7 | 44 | 7 | 44 | 6 | 4 | 4 | 4 | n/a |
| San Marino | 5 | 66 | 5 | 66 | 5 | 8 | 8 | 8 | n/a |
| Sao Tome & Principe | 8 | 66 | 8 | 44 | 7 | 5 | 5 | 5 | n/a |
| Saudi Arabia | 6 | 66 | 6 | 66 | 8 | 4 | 4 | 4 | n/a |
| Senegal | 8 | 66 | 8 | 66 | 7 | 5 | 5 | 5 | n/a |
| Serbia, Republic of | 3 | 66 | 3 | 70 | 5 | 3 | 3 | 3 | n/a |
| Seychelles | 8 | 66 | 8 | 70 | 7 | 5 | 5 | 5 | n/a |
| Sierra Leone | 9 | 66 | 9 | 66 | 7 | 5 | 5 | 5 | n/a |
| Singapore | 6 | 66 | 6 | 66 | 6 | 10 | 10 | 10 | 10 |
| Sint Maarten (Dutch) | 11 | 66 | 11 | 44 | 9 | 6 | 6 | 6 | n/a |
| Slovak Republic | 3 | 66 | 3 | 66 | 5 | 3 | 3 | 3 | n/a |
| Slovenia | 3 | 66 | 3 | 66 | 5 | 8 | 8 | 8 | n/a |
| Solomon Islands | 6 | 66 | 6 | 44 | 6 | 4 | 4 | 4 | n/a |
| Somalia | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a |
| South Africa | 9 | 66 | 9 | 66 | 7 | 5 | 5 | 5 | n/a |
| South Sudan, Republic of | n/a | n/a | 8 | 44 | 7 | 5 | 5 | 5 | n/a |
| Spain | 4 | 66 | 4 | 44 | 5 | 8 | 8 | 8 | n/a |
| Sri Lanka | 6 | 66 | 6 | 66 | 6 | 4 | 4 | 4 | n/a |
| Sudan | 9 | 66 | 9 | 44 | 7 | 5 | 5 | 5 | n/a |
| Suriname | n/a | n/a | 11 | 44 | 9 | 6 | 6 | 6 | n/a |
| Sweden | 5 | 66 | 5 | 66 | 5 | 8 | 8 | 8 | 8 |
| Switzerland | 5 | 66 | 5 | 66 | 5 | 9 | 9 | 9 | n/a |
| Syrian Arab Republic (Syria) | 6 | 44 | 6 | 70 | 8 | 4 | 4 | 4 | n/a |
| Taiwan | 7 | 33 | 7 | 44 | 6 | 10 | 10 | 10 | n/a |
| Tajikistan | 7 | 66 | 7 | 66 | 6 | 4 | 4 | 4 | n/a |
| Tanzania | 9 | 66 | 9 | 66 | 7 | 5 | 5 | 5 | n/a |
| Thailand | 6 | 66 | 6 | 66 | 6 | 10 | 10 | 10 | n/a |
| Timor-Leste, Democratic Rep of | n/a | n/a | 7 | 44 | 6 | 4 | 4 | 4 | n/a |
| Togo | 9 | 66 | 9 | 70 | 7 | 5 | 5 | 5 | n/a |
| Tonga | 6 | 66 | 6 | 44 | 6 | 4 | 4 | 4 | n/a |
| Trinidad and Tobago | 10 | 66 | 10 | 44 | 9 | 6 | 6 | 6 | n/a |
| Tristan da Cunha | n/a | n/a | 9 | 22 | 7 | 5 | 5 | 5 | n/a |
| Tunisia | 9 | 66 | 9 | 66 | 8 | 5 | 5 | 5 | n/a |
| Turkey | 4 | 66 | 4 | 66 | 4 | 3 | 3 | 3 | 3 |
| Turkmenistan | 6 | 66 | 6 | 44 | 6 | 4 | 4 | 4 | n/a |
| Turks & Caicos Islands | 10 | 66 | 10 | 44 | 9 | 6 | 6 | 6 | n/a |
| Tuvalu | n/a | n/a | 6 | 55 | 6 | 4 | 4 | 4 | n/a |
| Uganda | 9 | 66 | 9 | 66 | 7 | 5 | 5 | 5 | n/a |
| Ukraine | 3 | 44 | 3 | 66 | 4 | 3 | 3 | 3 | n/a |
| United Arab Emirates | 7 | 70 | 7 | 70 | 8 | 10 | 10 | 10 | n/a |
| United Kingdom of Great Britain & Northern Ireland | 20 | 66 | 20 | 66 | 5 | 20 | 20 | 20 | 20 |
| Uruguay | 11 | 44 | 11 | 66 | 9 | 6 | 6 | 6 | n/a |
| Uzbekistan | 7 | 66 | 7 | 70 | 6 | 4 | 4 | 4 | n/a |
| Vanuatu | 7 | 55 | 7 | 44 | 6 | 4 | 4 | 4 | n/a |
| Vatican City | 4 | 66 | 4 | 44 | 5 | 9 | 9 | 9 | n/a |
| Venezuela | 11 | 66 | 11 | 66 | 9 | 11 | 11 | 11 | n/a |
| Vietnam | 6 | 66 | 6 | 70 | 6 | 4 | 4 | 4 | n/a |
| Wallis and Futuna Islands | n/a | n/a | 6 | 66 | 6 | 4 | 4 | 4 | n/a |
| Yemen | 7 | 66 | 7 | 66 | 8 | 4 | 4 | 4 | n/a |
| Zambia | 8 | 66 | 8 | 66 | 7 | 5 | 5 | 5 | n/a |
| Zimbabwe | 8 | 44 | 8 | 44 | 7 | 5 | 5 | 5 | n/a |
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.