[Tristan Lall]

You know, there's a funny thing about branding and marketing: people will often pay more for an otherwise-identical product marketed under a fashionable name. I assume that you'd (hypothetically) be selling these as EricH-brand, which enjoys no recognition in the market—if so, you'll probably find that people are willing to pay much less than if it was a "designer" brand.

Of course, even for custom jeans, unless you're doing something ill-advised like making them in America with engineers for labour, the cost to manufacture each piece is going to be pretty low anyway.

There's another weird consequence of this business model: the consumer has to know what he wants in specific terms. Normally, you don't have the luxury of shopping with such specific expectations—so will your target market want (or even know how) to make those styling decisions for themselves when dealing with you?