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International Envelope Sizes

Size Millimetres Size Millimetres
DL 110x220 C3 324x458
DLE 114x225 C6 114x162
B6 125x176 B6/C4 125x324
C5 125x176 B5 176x250
C4 229x324 B4 250x353

Envelopes

Due to increased automation in mail processing, Australia Post applies limits on the size and shape of articles that qualify for the standard postal rate. In essence, standard articles must be oblong in shape, with the length at least 1.414 times the width. It should be no smaller than 88mmx138mm and no longer than 122x237mm. Thickness must not exceed 5mm and weigh should be less than 500 grams.

Australia Post provides a free letter gauge that indicates if articles fall into the standard category. Envelopes that fall into the standard category are:

90mm x 145mm (11B)
95mm x 210mm
110mm x 220mm (DL)
114mm x 225mm (DLE)
92mm x 165mm
100mm x 230mm
114mm x 162mm (C6)

International envelope sizes shown are all in accordance with international postal agreements. The DL and C6 sizes are also suitable for mechanical inserting.

 

Paper Size Dimensions (Note that these are all trimmed sizes)

Size Millimetres Size Millimetres Size Millimetres
4 A0 1682x2378 A8 52x74 C1 648x917
2A0 1189x1682 A9 37x52 C2 458x917
A0 841x1189 A9 37x52 C3 324x458
A1 594x841 B0 1000x1414 C4 229x324
A2 420x594 B1 707x1000 C5 162x229
A3 297x420 B2 500x707 C6 114x162
A4 210x297 B3 353x500 C7 81x114
A5 148x210 B4 250x353 C8 57x81
A6 105x148 B5 176x250
A7 74x105 C0 917x1297

 

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