Honestly, shoe sizing is a frustrating dark art. IMHO, there is no consistency across the brands. I have however found that the shoes that fit best are a consistent length, in my case 30.0cm, which should be no great surprise of course, but this length varies between 7, 7.5 and 8UK, depending on the maker. My advice is measure the length/width of your best fitting shoes to find a consistent average, and order accordingly after consulting the maker. Good luck.