Frye Chelsea, except that the Christy has a full zipper in back, while the Chelsea has none, and the Chelsea is actually slimmer at both the top and ankle.
Calf slimness: ***/5
In brown or black.
Sold out everywhere, for a while now -- but check the ebay listings - you might get lucky.
***fall 2014 update***
Grace (right) impressed me with its beauty and construction, but less so with its slimness.
Thanks in advance for posting feedback if you try the Marlene or another new style from this label...