These are my feet on the brannock device. Now I know I'm wearing gym socks in the picture, but my sock of choice for EG shoes are Chups and that brand is actually thicker than what I have on here. As you can tell, I measure about a 10C - 10C/D.
Now originally I blindly followed someone's advice and bought a galway in a UK9.5E. The resulting fit was absolutely awful. Lost a few hundred on the resale.
Then I thought I would try my Alden Barrie size as that seems to be a pretty popular sugestion. Ordered a 9E...the resulting fit was slightly inprooved, yet ultimately still poor. Lost another few hundred on the resale.
So at this point I'm pretty upset with myself and decide to fly to NYC and have a proper fitting done by the fine gentlemen at CitiShoes. We tried various widths and sizes, the process took a couple hours. Ultimately I left feeling confident that the UK8.5E was the best fitting size I could attain and was told that all EG lasts basically fit the same so I should be good to go.
Well...the 82 last and a few others fit wonderfully in that size, but it's definitely not a blanket solution for all of them. In fact my boots fit amazingly but the shoes are kind of meh. I think I could actually size down another half to a UK8 in the 202/606 - time will tell.
The 888 just simply doesn't work for me. The heel cup is too large for my foot. Going down another half size or a width more narrow crushes my foot. I've had to cut my losses with that one.
The moral of this story is that your mileage will definitely vary! Some go .5 size down...others a full...some like me 1.5 or even 2 full sizes down! I hope this was somewhat helpful.
The lasts are dark and full of terrors.