The best way to find out the right size is measuring both of feet in length. Using the longest length of the foot to match with the size chart. We also have a list of the width fitting under the size chart, so that you can choose the style that fits you well.
For example, Customer Kerry already measured her feet. Her right foot is 23.5 cm long, and left foot is 23.3cm. She has broad feet and high instep. Therefore, she will be the size 3.5 in our shoes. Styles are slightly wide or wide fitting will be good choices for her, for instance, Style "Sharon" and "Ivy".