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 |
|---|---|---|---|
| Send within Australia | 22kg | 105cm | 0.25 cubic metres |
| Send overseas | 20kg | 105cm | 140cm girth |
How we assess postage for parcels sent within Australia
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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 under
Use other packaging (yours or ours) and postage is based on the weight or cubic weight (whichever is greater2), and the destination.
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Sending 5kg - 22kg
The postage for parcels 5kg – 22kg is based on the weight or cubic weight (whichever is greater2), and the destination.
How we assess postage for parcels sent overseas3
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
Calculate the cost and time to send your item
Use our online calculator to estimate the postage price and delivery time to send your letter or parcel within Australia or overseas. If you need more assistance, visit your local Post Office and talk to our friendly team.
Terms and conditions apply (PDF 1.04MB)
1 Check at your PO Box location as access times vary.
2 Red door boxes are available at participating Post Offices. Parcel delivery via red doors is subject to size and availability restrictions. If your parcel can’t be delivered using a red door box you’ll receive a card or digital notification advising collection from the counter at the Post Office. Fees and charges may apply to carriers other than Australia Post and StarTrack to deliver parcels to PO Box services. Carriers may pass this cost on to customers.
3 Specified pricing is for CBD locations, or PO Box locations in high demand. Applies to PO Box services in Canberra, Hobart and Darwin GPOs and certain Post Offices as determined by Australia Post.
4 Excludes persons residing on houseboats, water/sea vessels or on a private road such as a caravan park, gated community, retirement village or defence force barracks. Only available for customers where Australia Post doesn't deliver to their residential or business address, and each non-delivery address is eligible for one reduced rate PO Box or Private Bag at the nearest Post Office. Assessment can take up to seven days. Customers may be changed to full rate if delivery circumstances change.
5 Free 6-month mail redirection for new leases from your street address to your new PO Box, not from one PO Box to another PO Box. Lodge your mail redirection application in store when you collect your new PO Box keys.
6 Fees and charges may apply to carriers other than Australia Post and StarTrack to deliver parcels to PO Box services. Carriers may pass this cost on to customers. Size and weight limits apply.