I purchased these boots in a size 9 as the company only sells whole sizes. If I could describe the size.. I'd say these are an 8 and 3/4 not as fitted as an 8.5 and not as large as a 9. I bought the grey. The sole and bottom black part is thick rubber. All the grey areas are a water resistant fabric, kind of like a snow jacket's material. The inside faux fur is very soft and I think when I wear these, they will keep my feet warm. I gave this rating a 3 star b/c these boots are particularly bulky and even when the laces are pulled very snug, there is still plenty of room all around. I would say even, that your snow pants could be tucked in if you wanted too. I tried them on with jeans and there was a lot of room. These boots seem they would accomodate a larger calf, baggy snow pants and thick socks.