Gordner25US sizing. Do note that many people find Inov-8's shoes to be a tad small and often go a half-size up. I wear men's size 9 across the board and the men's Mudclaw 300 and men's Roclite 290 fit me perfectly in size 9. However, despite Inov-8 advertising all of their shoes in both men's and women's sizing, I had to get the women's Roadtalon 240 and women's Roclite 325 in women's size 11 (men's 9.5) for a perfect fit. Other than my own anecdotal experience with that half-size discrepancy, I do not believe there is a functional difference between the men's and women's version of any of their shoes.