I'm a 10d on the Barrie and went with 10.5d in the Leydon last suede chukka. I probably could've gone with an e width, as my feet are somewhat wider than normal. That said, the chukkas fit like gloves -- both in length and width -- and I think that, because they are unlined and super soft, a closer fit isn't bad. I've already walked a couple of miles in mine and had no problems.
that sounds good! thanks