Hi Emily,
I have women's SIDI shoes, very old pair but I bought them new. I was looking for a pair for my spinning class and told the shoe guy I wanted "you ugliest, cheapest pair." Well, I got em alright. I wear a 7.5 in a regular shoe and these are a euro 40.
They fit ok, but my left foot - toes fall asleep all the time. Both in spinning class and on the road. I really want a pair I saw that were "Specialized" they looked wide (which I have wide feet) and very comfortable - but very expensive.
Perhaps someday when I can't stand looking at the ones I have!
klr