Shoes

What is the size difference between men and women’s shoes?

I’m a girl, but I usually just buy men’s sneakers because I have long feet and most stores rarely have my size shoe on hand. If I wear a 10 in men’s size, then what size will I wear in women’s?

Btw, I’m from the US.

Here is the size conversion chart:

http://www.zappos.com/measure.zhtml