I love Moon Boots.  I was hopeful that this one would fit as it's lining is thick.  I wear a 6.5-7 N and have a very narrow heel.  As I thought,  the lining made the boot width fine in the forefoot; however, the heel was so wide I had to return it.  Every time I took a step, my heel popped up and made the boot unwearable.  Other than that, it was great and I'm certain fine for most B widths.