Prepaid satchels 5kg and under
Postage for prepaid satchels and mailing boxes is based on size, not weight. Choose from 5 sizes.
Guidelines and postage costs for parcels and letters
Check the size and weight requirements for sending a letter or parcel within Australia or overseas, and use our online calculator to estimate the postage price and delivery time to send your item.
- Parcels
- Letters
Maximum size and weight1
| Destination | Maximum weight | Maximum length | Maximum dimensions |
|---|---|---|---|
| Domestic | 22kg | 105cm | 0.25 cubic metres |
| International | 20kg | 105cm | 140cm girth |
How we assess postage for domestic business parcels
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Flat rate packaging 5kg and under
Flat rate postage is based on size, not weight. Choose from boxes, mailing tubes, tough bags and more.
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Other packaging 5kg and under²
Use other packaging (yours or ours) and postage is based on the weight or cubic weight (whichever is greater), and the destination.
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Sending 5kg - 22kg²
The postage for parcels 5kg – 22kg is based on the weight or cubic weight (whichever is greater), and the destination.
How we assess postage for international business parcels3
International parcels are charged according to actual weight. The maximum weight you can ship is 20kg and the maximum girth is 140cm.
You don’t need to cube Australia Post International parcels, including prepaid satchels and flat rate satchels.
The formula for working out the girth of your overseas parcel is: (width + height) x 2 = girth.
When measuring dimensions, the longest side of the parcel is considered the length. Ie, the two shortest sides are used to calculate girth.
For example: a parcel with dimensions 10cm, 105cm and 20cm
= (10cm + 20cm) x 2
= 30cm x 2
= 60cm girth. Within girth limit
Or for a parcel with dimensions 40cm, 35cm and 100cm
= (40cm + 35cm) x 2
= 75cm x 2
= 150cm girth. Exceeds girth limit
Business price guides, postage costs and delivery times
Download our business price guides or use our online calculator to estimate the postage cost and delivery time to ship your parcel or letter within Australia or overseas. If you need more assistance, visit your local Post Office and talk to our friendly team.
Parcel and Freight Preparation Guide
Read and download our guide to help prepare your business parcels for delivery through our network, including labelling, manifests and packaging.
1 Some domestic parcel services have specific size and weight restrictions. Check our parcel service or visit your local Post Office for more details before lodging your article.
For parcels where you use your own packaging or any other packaging, which is not eligible for the national flat rates for postage based on size, Australia Post will assess charges according to the actual weight or cubic weight equivalent of the parcel, whichever is greater. Learn more about cubing on page 5 of our Domestic parcels guide (PDF 443kB).
2 For parcels where you use your own packaging or any other packaging, which is not eligible for the national flat rates for postage based on size, Australia Post will assess charges according to the actual weight or cubic weight equivalent of the parcel, whichever is greater. Learn more about cubing on page 5 of our Domestic parcels guide (PDF 443kB).
3 While Australia Post accepts articles of the specified size and weight for international posting, some countries may have their own restriction on parcel sizes. Please check with the foreign postal agency if concerned or view our International post guide.
4 Available in November and December only.