I wear a men's 7 W shoe. Because men's shoes are wider than women's shoes, they're more comfortable.
FYI, in USA man's sizes = woman's size - 1
My feet are often too small for men's shoes. Luckily children shoes come in many width sizes too. And, the past few years, women's shoes have become one or two sizes wider in general. So, November 2009, I managed to buy myself two pair of women's shoes.
According to my daughters, I am finally looking somewhat feminine.
They were impressed with the improvement.
Well, they are honest.