I am a size 11 in Australian shoes and the size graph said it was the same as the American size so I ordered an 11 but unfortunately they were a full size small, my toes were pressing at the tips and they were painful to wear so I had to return them. Definately go a full size up from what you normally would. I paid in total $105 postage here and back and I was hoping Amazon will be nice enough to refund me all of it but they did not. Apart from that great looking shoe, love the connected tongue and also comforable.