From Auspost's website:
Letter size and weight guidelines
We classify a letter as an item that:
In other words, just put a $1.10 stamp on the envelope and stick it in a mailbox, don't give anyone the opportunity to argue.
Incidentally, I'm told that here in the boonies of TAS, you can put your outgoing mail in your OWN letterbox with a red rag tied somehow to the box, and your mail man/lady will take it and send it on its way. I've never done it, but my neighbors have.
Letter size and weight guidelines
We classify a letter as an item that:
- weighs less than 500g
- is no thicker than 20mm
- contains flexible items - nothing rigid or inflexible
- has a rectangular shape
- is no bigger than a B4 envelope (260mm x 360mm x 20mm)
In other words, just put a $1.10 stamp on the envelope and stick it in a mailbox, don't give anyone the opportunity to argue.
Incidentally, I'm told that here in the boonies of TAS, you can put your outgoing mail in your OWN letterbox with a red rag tied somehow to the box, and your mail man/lady will take it and send it on its way. I've never done it, but my neighbors have.