#Explanation of Sizes [Women's / USA standard]
7 = 240mm
8 = 250mm
9 = 260mm
10 = 270mm

Q]What does B(M) mean in shoe sizes?

A]While sizing may vary depending on the manufacturer, in most cases, a B in a woman's shoe size indicates a normal or regular-width shoe. A normal or regular-width woman's shoe may also be indicated with an M