If anyone was wondering, the current acceptable/fashionable width for mens ties is 3.25 inches. In general, 3-4 inches, definitely no more than 4.
Why do I know this? Because my grandma was over here today wondering which of Grandpa's many ties were still acceptable. Apparently he was wearing a very wide (and wrinkled) tie to church last Sunday because they're cleaning and unearthed some old ties.
I believe I'm getting the old ones for craft projects...should be interesting.
So, there you have it...get out a ruler and measure away! I believe build was supposed to be factored in as well, i.e. if you are short and wide, be very careful not to wear too wide of a tie. Likewise, if you're tall and thin, you can get by with a wider tie.
I wonder if my dad's ties are the "proper" width? Actually the old one he has that he wore for work in the early 80's is probably about right.