Hi, I saw that some shoes in Robinsonshoes website are labelled as F width or G width. Are they truely wider than the D or E width offered by some local shoe manufacturer?
It is almost impossible to compare widths between different makers based on the alphabet "value" assigned.
The system is fairly arbitrary, but suffice to say that standard width is most comonly defined as either "E" or "F" width. Which means to say that regardless of maker, "D" is almost always narrow, and "G" is almost always wide, for a particular last of a particular maker.
It would be impossible to say, however, if E width for maker X is narrower than F width for maker Y.
Next, one would also need to consider the "natural width" of the last. For example, for EB, 363MOD last in standard width is wider than 2102B last in standard width.
Which means, in this case, the alphabet value counts for next to nothing when discussing width.