Australia Post Website
Delivery is generally 2-4 business days for most locations withing Australia and next business day for express post if you are inside the zones available. To find the current estimate for delivery times to your area go to the Australia Post delivery calculator and enter in 3029 for the sending postcode and your post code for the receiving address.
For international estimates select the overseas tab, enter 3029 in the sending postcode and select your country of delivery. This will give you estimates on both standard and express shipping.
Through the checkout page the shipping estimator in the middle of the screen allows you to select down to the Zip/Postal code to give you as close to accurate as possible eta on delivery to your location.