The increase is 10c per $1, so :

$1.10-regular letter

$2.20-large letter 125g

$3.30-large letter 250g

$5.50-large letter 500g

Starts 2/1/2020 because the first is a public holiday. Honestly, they could not have waited until feburary? I don't want to be dealing with this now.

So far there are no $1.10 or 10c stamps available to purchase and the change is happening in only 2 weeks. With Auspost's incredibly slow delivery times (go figure) for their online store, I would like to order them now.

Ok, ok, I'll stop whining.