The peculiarities of the J.M. Weston models mean that each of them wears different shoes. In order to satisfy your purchase, we suggest that you carry out your measurement prose at home.
Position your feet on a sheet of paper and trace their outlines, using a standard wooden pencil (8mm thick) held perpendicular. this way you will get, for each foot, the maximum length and the largest width.
Measure in millimeters, using a ruler; the length (toe-heel) and width (side line) of each of your feet.