Monogramming Clogs?

I have seen these things advertised on a few sites and while they are specifically targeted to women (that's an assumption.........I am a woman & I would wear them, but I dont' think men would....)

I would like to know what kind of hoop type apparatus it takes to "do" these? Something like a hat hoop? Intriguing to me!

I sure can't see how the market in "my area", of middle Tennessee, would make this a viable cash flow option for me, but I'd like to SEE how it works.

Sam