I am 25cm shoe size, but unfortunately it was a bit small. Because I am a bicycle wearing kappa, rainwater passes through kappa and rainwater enters the shoes from the instep of the foot. So I bought this shoe cover. Although the specification feeling is satisfactory enough such as strength, it was a little small and could not completely cover the instep side of the foot. I think that it is ok if the foot of a woman about 23 cm is OK, but I was sorry for a moment.