I often wonder how many kilts are "in circulation"? No way to tell I'm sure!
But maybe a better question would be how many kilts on average are sold by the 'major vendors' in the US each year?

By major venders, I'm talking about places that sell a lot of kilts whether custom or off the peg, casual or trad, as a primary part of their business, places like USA Kilts, Stillwater, Frugal Corner, Sportkilt etc, not necessarily craftspeople who might sew up 5 or 8 per year.