Well actually they do : "IMPORT CHARGES : If you are purchasing I Love Ugly products and you live outside of New Zealand please be aware of any import duties and taxes that may be charged on delivery into your country. These charges depend on your country's import legislation and are not covered by I Love Ugly Ltd." (http://www.iloveugly.net/delivery-and-returns)I just checked on my online statement, my import charges were $2.84 total for the Ralph pants I received the other day. So you're using a bank card by any chance, you can check what's the total there. I assume it based on what the package weighs. Just do some calculations as my order only weighed a little under 1lb.
BUT, I didn't find any place to calculate it an know the amount I was going to pay before I received my package... I probably won't order from their official website. I also ordered a cap, I'll see how much it'll cost me (hopefully not too much)