I live in Australia and am very confused on what size to buy. I am usually a size 9 or 10 Aus and 41 Europe. I have a pair of cowgirl boots from NOVO shoes which are a size 10 Aus. If I go by Sheplers sizing chart I will end up with a size 12US and 44 Europe. So therefore am very confused as none of the sizing adds up. I am thinking of taking the gamble and buying a size 10US?