We always recommend using the centimeters (CM) sizing of your existing trainers as a guide for what Feiyue may work for you.
To find your typical CM size, simply check the size label of an existing shoe you have (see example below).
Each Feiyue shoe has it's own sizing chart on it's product page. Simply click (here), select your style and scroll down the product description to see the styles sizing table, which includes CM measurements for you to be able to find your closest fitting Feiyue shoe.
If also else fails feel free to contact us and we will be happy to guide you (here)