In most running shoes, I wear an 8. I could not find this color shoe in a ladies 8 and really wanted to try a sockless shoe for my Ironman in November. Based on reviews of the women's and men's zoot, I took a chance and ordered a men's 7. It fits perfectly with my orthotic. I've run some short mileage without socks and so far no blisters or chafing.  And I love the colors.