I ordered a pair of these for my roommate (black, 6.5) and myself (blue, 9).  My roommate has a high arch, but not freakishly so, and could not get her foot in the boot.  Not even close.  When my boots came I had no trouble at all getting my foot in--and I have a high arch, although not quite as high as hers.  Weird.  My boots are a bit loose barefoot, so I will have plenty of room for socks, which is good, because either the felt or the fabric is scritchy against the backs of my legs if I lace the tops close.  The boots are lightweight, with a nice supportive footbed with enough cush to be comfortable.  The laces at the ankles really do snug the boots to my foot--no loose-shoe rubbing. I love the blue color, and i think i will have no trouble getting skinny jeans into the boots (i do have skinny calves, though).  Since I live in FL I can't say yet how warm these boots are, or how waterproof, since I just got the an hour ago, but i think other reviewers have covered those aspects.

I am going to return the 6.5's for 7's and see if they fit my roommate better, since you really can't beat Amazon's price for a pair of warm, waterproof Sorel's.

I'll try to remember to return to this review if I have more info.

UPDATE:  my roommate could not get her high instep into the size 7's either.  I, however, like mine more every time I wear them.  Warm, comfortable, cute and "unfussy" winter boots.  I love them on cold, rainy excursions with the dogs.