You would most likely want a 12UK G&G
The 13 US on the Barneys site will actually be a 12.5UK.
Rain and Inca are two of the widest fitting lasts from Carmina so sizing up half a size would probably be wise.
The lasts from G&G are similar in fit over the instep and over the mid part of the foot (the width). The difference (also mostly a matter of personal taste) is how you want the toe cap to look like which is the most important variation between all G&G lasts.
Hey guys, I'm a tad bit worried about fit because of my wide feet. What's more is they're wider than the average further down the feet as well. I'm going to be asking G&G as well but just wanting some thoughts from members as well. Think this is bespoke only material? Or would UK10F/G would be okay? E will definitely be a no no, right?
^Yup, at Wilkes-Bashford. I was going to go Vass, but the instep sizing looked tricky, and I'm don't want to buy shoes I can't try on first. G&G looks better suited for lower instep and I can try it on here (and has the nice waists I've been wanting in a shoe). Just wary about the cost as the most expensive shoes I've owned thus far are C&J benchgrades.