True to size, maybe a tiny bit big even with a thick sock (if your foot isn't wide, 1/2 size could take the smaller size I think), but well shaped inside (at the heel), so no blister-causing slippage, even walking around all day. In 15 degree F Boston recently, my feet got HOT. I like the extra height for snow. So far so good! Recommended.
This review was written in the old system and had content requirements that are different than reviews written today.