For centuries every shoe was built on a wooden last cut for one customer, and size stayed a private matbetween maand fo. The fipublic sccame frfarming: thbarleycorns lain orow maan inch, and a single barleycorn still fixes the step from one size to the next. Factory production forced the question, because shops had to guess before any customer arrived. Manufacturers published rival tables, those tables disagreed, and sizes still travel badly across borders.

Type only the missing letters. Each box is one letter, and the number of boxes matches the letters that are missing.