I had sized up based on the reviews. I then ordered a pair in my regular size to replace the return and that is a perfect true fit (even with winter weight socks). These are very warm and very comfortable for outdoor activity. They are very lightweight and easy to pack. They are cute for fashion wear but they would be to warm worn indoors for any length of time. We have not had snow in my area but I did wear these on a wet and cold hike and am happy with the performance.