$0.05
$0.25
$0.50
$1.00
$1.10
$1.25
$1.30
$1.35
$1.45
$1.50
$1.60
$1.65
$1.95
$2.05 

$2.10
$2.20
$2.35
$2.40
$2.50
$2.70
$2.90
$3.70
$4.00
$4.20
$4.30
$4.50
$4.70
$20.00 

http://auspost.com.au/parcels-mail/stamps-and-mail.html

sadly chezzy they have discontinued the C5 international prepaid envelope, which is a pity because it was very useful to me.