I wear 8D in Barrie and took a shot in the dark and went 8.5D in the Aberdeen. I have really narrow ankles but worry about the sharp point in the toebox. Going 8.5D was the sizing advice I received from TSM. If it doesnt work I will be disapointed to say the least.
I have actually considered seeing if I could size it up a bit because having a boot that is a little loose is better than something that is too tigh.