How do you convert clothing sizes from us to NZ?

NZ sizes are the same as Australian sizes pretty much.

To convert US sizes to an Australian/New Zealand size you add two sizes

so a 2 in the US is a 6 in NZ

a 4 is an 8

a 6 is a 10 and so on

obviously to convert the other way take away two sizes

so if you're a size twelve in New Zealand and you're buying US clothes on line then you should be buying size 8's.

Hope this helps