Hello Chor Jia Hung, It's really a rare case! We make the costumes/shoes according to the criteria you supply. We suppose your body/foot size will not have a sharp change within few weeks, right? For the size of your foot, just measure the calf circumference and the boot height. :)
If we made wrong size, we will surely responsible for it, and you can just submit ticket (with order number & simple description) to our
Support Center and let my teammates help you directly. n_n