They are Frye Deborah ankle boots. Shopbop has a couple of plain versions in their current lookbook. I went thru all the lookbook pictures and now I'm dying for ankle boots When I did a search, all the other websites have the studded version. At first I thought I like the plain version, but the studs have been growing on me.
I got the boots - the half size smaller fit perfect. They zip up on the size, so they are not huge around the ankle, but skinny jeans tuck into them perfectly - I love them!