I have size 11W feet and thicker calves, and always have.  My calves aren't super super big, but they are thicker than many, and these fit very well on me, with plenty of room for tucking in some jeans, or several layers of warm pants (like when playing in the snow :).
If you have longer feet (like me) but have skinny legs, I would not recommend these unless you want them to be REALLY roomy.
Also, I was very pleased with the thick/warm lining of these boots.  I haven't gotten a chance to wear them yet, but I expect great things!