i stand (in my JLs) corrected
Edward Green Appreciation: Pictures, Info, and Where to Buy - Page 68
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oops, burnishing. don't get behind. nvm.
EG widths are generally available in what they call D and E and on rare occasion you'll find someone that stocks either C (really narrow) or F width (pretty wide). They do not do any width converting for shoes sold outside the UK. In other words, an Edward Green E width shoe sold in London is the same as an E width sold in New York. E width seems to be Edward Green's standard width. Fit will depend on the last you choose also.
Are they on the 724? Nice last. EGs antique burgundy is a little darker than the AS oxblood but it would indeed be a good replacement. Personally my favourite version of this colour would be the GGs Vintage Rioja, it's got so much depth to it (although it is very dark)
Edit: Checked the Bespoke England MTO for GG, perhaps their Rosewood Calf is more similar to the AS Oxblood