This size no longer fits.
This is not because my feet have gotten larger. It is because New Balance is, for some perverse reason, making their shoes narrower. I measured the sole of an older pair of New Balance 13 EEEE shoes against a new pair and the new pair was markedly narrower.
I have a new pair of 13 EEEEEE shoes from New Balance now. They are exactly the same width as the older 13 EEEE shoes that I was wearing.
Well, at least I have shoes. Although the number of choices in 6E is pretty limited...