Not sure about the practicality of this, but damn!!
I think they look pretty nice.
That's what I thought and to be honest most don't, however with a narrow foot there's a good chance depending how narrow that's this might work out for you. Basically the Standard width for Edward Green is the E width. This width equates fairly closely to the regular US D width. The Edward Green D width that Axels sells is their narrower width and although this works for some it is a bit narrower than a US D width shoe. Most other retailers but not all stock and sell the Edward Green E width.
One of the reasons I don't purchase more from Axels is because I'm a person with a US D width and my fear of course would be that some of their shoes would be to narrow. Do keep in mind that if you purchase a Galway from them and this works for you that boots can tend to be a bit roomier than shoes on the same Last so there are no guarantees a shoe on the same Last will work for you.
Bottom line however is that I do not know what there return policy is and I was unable to find anything just now on their website. I would imagine there might be someone here that does and in fact I imagine someone here shops with them fairly regularly. However you could always contact them first hand and see what they say as well. Sorry, but I just have no idea what their return policy is.