I knit these socks with my foot in mind. A size 9. This pattern is so easily adjustable just by adding or removing two stitches at the cast on and adjusting the length of stockinette you knit when making the foot. You can just try them on as you go to get the perfect fit, or like I did you the handy heel2toe ruler from Wild Stitchers (on Etsy). This tool makes getting the perfect sized sock every time a piece of cake!