Basically Auspost is shifting their current pricing methods from weight-based to size-based. (If you use their packaging)
They raised the minimum price for a small parcel from $8.30 to $8.95.
However, you can save more if you are sending a small parcel with larger weight.
E.g. 5kg Small parcel now $11.05 >> $8.95 afterwards
Use your imagination ;)
Additional information for clarification
Using your own packaging
We're replacing existing pricing zone structure with zoned flat rates¹ when you use your own packaging.
Once you know which weight break your parcel falls into and where you're sending to, you will now know your postage cost. As long as your packed item is 5kg or under, you will be able to send it anywhere in Australia for a zoned flat rate based on the four weight breaks below:
Up to 500g;
Up to 1kg;
Up to 3kg;
and Up to 5kg
Using Australia Post Packaging
We're changing our Flat Rate Satchels and boxes from weight based to sized based. You can now pack up to 5kg in any of our Small, Medium, Large or Extra Large satchels or boxes and send anywhere in Australia for flat postage rates based on the size of your packaging and your delivery speed. So once you know your size and delivery speed, you’ll know your postage costs
Time to shift some lead.
Now I can finally buy my car batteries interstate.