International Post Guide - Australia Post

6 International Post Guide
SECTION 1 – INTERNATIONAL POST DEFINITIONS
�1.1 – Air Mail Letters
For international purposes, an Air Mail Letter is an oblong article with a length, a width, a thickness,
and a weight. Air Mail Letters include:
� a Postcard or Greeting Card – see �1.1.3 for the special conditions that apply
� an Aerogramme – see �1.1.4 for the special conditions that apply.
All Air Mail Letters are carried by Air Mail.
Width
�1.1.1 – Air Mail Letter sizes
An Air Mail Letter is an article that conforms to the limits shown below. Any article with any
measurement that exceeds these limits is not an Air Mail Letter – it is an International Parcel.
Dimension Maximum
Length 360 mm
Width 260 mm
Thickness 20 mm
Weight 500 grams
ISO recommended envelope sizes for Air Mail Letters
The International Organisation for Standardisation (ISO) recommends the following envelope sizes:
DL 110 mm × 220 mm
C6 114 mm × 162 mm
C5 162 mm × 229 mm
C4 324 mm × 229 mm
B4 353 mm × 250 mm
September 2007
Length