I followed one of the previous reviewers advice and ordered a size larger than I am (WM 11). I'm glad I did because boy were these tight! The design of the actual boots is great and the materials seem like they will hold up well. I'm a plus sized person and so when I went to put the boots on I was sad to have the tops of the boots be really tight around my calves. I'm fortunate in having an hour glass figure and so my calf area is not really all that big but still they were pretty tight. I'm on the fence if I will return them as it seems to be hard to find a rain boot that will hold up in my shoe size. I intended to use these for taking our dog to the dog park as it's going to be wet and mucky for a couple more months. I hope Kamik will make the tops of their boots a little larger in the future as it seems like they make great products!