I ordered other Kamik rainboots last week and had to return them because they were too small around the calves, but these work! (I probably can be considered to have medium to large calves because I walk around 3-5 miles a day across my college campus, so take that into account.) These boots have enough room in the top to get jeans into and they actually have excess room (maybe a little too much?) room in the ankle so your jeans fit in nicely. I normally wear an 11 and got an 11 in these boots. They seem a tad bit big but I can't tell yet if it'll bother me when I walk for a long time. And a bonus is that these boots are super cute too!