I have, generally I have not found it to be enough that I have ever needed to worry about it. However I was able to fit into a D width EG 82 in a boot when I know I could never do so in a shoe. But a 82 E in a boot works for me as well. Just because I have found some boots roomier doesn't mean for the most part that its enough to justify another size. Besides any size change would kind of depend how snug or loose that size is for you to begin with.