Had to exchange these boots for larger size. I normally wear 6.5 in shoe, 7 in running or boot.  Ordered a 7 since most reviews said true to size and loved them, but they were just too cramped to wear for any length of time.  The insides are super warm and soft, good arch support and very comfortable right away (with the right size).  The tread feels very secure although I haven't worn them in snow yet.  I recommend going up 1/2 size, or 1 whole if you plan to wear heavy wool hiking socks like I do.  I ended up with an 8 and am very happy; can't wait until cold weather and snow to try out the water resistance...