From Australia Post: 
Why COVID-19 may cause delivery delays. 

Please note:
Australia POST shipping times are approximate only and peak times, public holidays, and other such disruptions to the postal system or may cause delays. Customers are responsible for any customs duty delays and/or fees.

Please allow the correct handling and shipping times. 
The handling time, "unless specified", is 24-48 hours after purchase. This is the time it takes to design, manufacture and pack your order. Add the handling times to the shipping times below:

FREE Shipping over $50 - 4-10 business days.
Express Post - 1-4 business days.
NT should add 2 days.

New Zealand:
Flat Rate - 9-25 business days.

United States:
Flat Rate - 10-25 business days.

Flat Rate - 15-30 business days.

United Kingdom:
Flat Rate - 12-30 business days.

Unfortunately, we are unable to offer exchanges, credits, or refunds if you didn't allow enough time for your order to arrive.

Shipping Policy subject to change without notice.