What are the mail size limits?
The size limits are listed below. The girth + length size can be calculated by adding the two shortest lengths together (width + height) then multiplying by 2 then adding the length.
First Class Air Mail International (economy)
- 4.4 pounds maximum weight (2 kg).
- Minimum length and height: 5.5 inches x 3.5 inches (13.75 cm x 8.75 cm).
- Minimum depth (thickness): .007 inch (0.175 mm).
- Maximum length: 24 inches (60 cm).
- Maximum length + height + width: 36 inches (90 cm).
- Maximum length: 42 inches (105 cm).
- Maximum length + girth: 97 inches (242.5 cm).
- Large First Class Mail Packages cost more to ship (~40% more) than small packages.
The weight is calcualted by rounding up to the nearest 1/4 lb.