Killstar shoes are listed in women's US sizes which are same as Australian sizes.
Killstar shoes can run large so we recommend sizing down; e.g. if you're an 8 Australian women's you would best suit a 7 in Killstar shoes.
Those with half sizes should size up, e.g a size 8.5 women's would best suit a 9.
Feel free to contact us for individual help with your sizing.