These are good casual boots with a functional design. I bought a pair in green. The shoe is a full size smaller than the usual Keen last. I had to pull out the footbed and replace it with a thin Specialized insole just to get my foot inside the 9.5, when I normally wear a 9 in Keen. They are still a bit snug. I'm still trying to decide whether to return these boots rather than endure a seriously uncomfortable break-in period. I don't believe in wearing shoes that must be "broken in".
The calf fits okay. I'm a medium-sized woman (8/10). While researching this product, I found a review on the REI website left by an irate, self-describe size 14 woman who was left "feeling fat" because she could not zip up the boot. If you are a larger woman, don't even bother placing the order. If you are a smaller woman, you will have a loose boot-top, perfect for tucking in your pants.